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USER MANUAL EXT3-UE-R Kramer
4x1 USB Switcher Transmitter, USB Receivers, 1:2 CAT Cable Splitter

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USB DEVICE 1 HOST 2 4x1 USB Switcher Transmitter HOST SELECT 1 2 3 4 A+B CAT NET STATUS SWT3-4!-U-T
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HOST USB CAT OUT PoC USB DEVICE ① 3 4 A / A+B B 2 3 4 I/O R5-232 S1 S2 G Rx Tx LAN PoE ◀ L+ L- G R+ R- AUDIO IN RESET 12/20V DCContents
Introduction 1
Getting Started 1
Overview 2
Typical Applications 5
Defining SWT3-41-U-T 4x1 USB Switcher 6
Defining SWT3-41-U-T 6
Defining EXT3-UE-R 8
Defining EXT3-U-R 9
Defining ACC3-12-SP 10
Mounting SWT3-41-U-T, EXT3-UE-R, EXT3-U-R, and ACC3-12-SP 11
Mounting SWT3-41-U-T 11
Mounting EXT3-UE-R 12
Mounting EXT3-U-R 13
Mounting ACC3-12-SP 14
Connecting SWT3-41-U-T 15
Connecting the Output to a Balanced/Unbalanced Stereo Audio Acceptor 17
Connecting a Balanced/Unbalanced Stereo Audio Source to the Balanced Input 17
Connecting to Devices via RS-232 18
Operating and Controlling SWT3-41-U-T 19
Principles of Operation 19
Using Front Panel Buttons 22
Operating via Ethernet 22
Using Embedded Web Pages 26
Operation 29
Settings 30
Diagnostics 50
Administration 50
Viewing the About Page 56
Upgrading Firmware 57
Technical Specifications 58
SWT3-41-U-T 58
EXT3-UE-R 59
EXT3-U-R 61
ACC3-12-SP 62
Default Communication Parameters 63
Protocol 3000 64
Understanding Protocol 3000 64
Protocol 3000 Commands 65
Result and Error Codes 75
Introduction
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been providing a world of unique, creative, and affordable solutions to the vast range of problems that confront the video, audio, presentation, and broadcasting professional on a daily basis. In recent years, we have redesigned and upgraded most of our line, making the best even better!
Getting Started
We recommend that you:
- Unpack the equipment carefully and save the original box and packaging materials for possible future shipment.
• Review the contents of this user manual.

Go to www.kramerav.com/downloads/SWT3-41-U-T to check for up-to-date user manuals, application programs, and to check if firmware upgrades are available (where appropriate).
Achieving Best Performance
- Use only good quality connection cables (we recommend Kramer high-performance, high-resolution cables) to avoid interference, deterioration in signal quality due to poor matching, and elevated noise levels (often associated with low quality cables).
- Do not secure the cables in tight bundles or roll the slack into tight coils.
- Avoid interference from neighboring electrical appliances that may adversely influence signal quality.
• Position your Kramer SWT3-41-U-T away from moisture, excessive sunlight and dust.
Safety Instructions

Caution:
- This equipment is to be used only inside a building. It may only be connected to other equipment that is installed inside a building.
- For products with relay terminals and GPI\O ports, please refer to the permitted rating for an external connection, located next to the terminal or in the User Manual.
- There are no operator serviceable parts inside the unit.

Warning:
- Use only the power cord that is supplied with the unit.
- To ensure continuous risk protection, replace fuses only according to the rating specified on the product label which is located on the bottom of the unit.
Recycling Kramer Products
The Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC aims to reduce the amount of WEEE sent for disposal to landfill or incineration by requiring it to be collected
and recycled. To comply with the WEEE Directive, Kramer Electronics has made arrangements with the European Advanced Recycling Network (EARN) and will cover any costs of treatment, recycling and recovery of waste Kramer Electronics branded equipment on arrival at the EARN facility. For details of Kramer's recycling arrangements in your particular country go to our recycling pages at www.kramerav.com/social-responsibility/environment.
Overview
Congratulations on purchasing your Kramer SWT3-41-U-T/EXT3-UE-R/EXT3-U-R/ACC3-12-SP.
This section defines SWT3-41-U-T, EXT3-UE-R, EXT3-U-R and ACC3-12-SP.
SWT3-41-U-T 4x1 USB Switcher
The SWT3-41-U-T is a high-performance switcher transmitter with two USB-C and two USB-B ports for USB host devices connection and plug and play host user auto-switching experience based on active USB signal detection. The local and remote (over CAT-links) connected USB peripherals, such as a room camera and microphone, are switchable for use of the active USB host, for convenient online meeting participants operation.
SWT3-41-U-T provides exceptional quality, advanced and user-friendly operation, and flexible control.
Exceptional Quality
- USB 3.2 Switching — USB 3.2 signals switching, enables high data-rate connection between active USB host and meeting space USB 3.2 and 2.0 devices, such as 4K camera, high-quality audio devices, and HID (Human Interface Devices) mouse or keyboard devices.
- Comprehensive USB Extension – Integrated dual-link transmitters for USB and LAN signals extension with 2-way power providing over extended-reach CAT twisted pair copper infrastructures. The locally selected USB host is auto-connected to remotely connected USB devices, employing either interrupt, bulk or isochronous USB 2.0 standard data transfer communication
- Cost-effective Dual-link USB Extension Deployment – Link-paired remote USB receivers are flexibly connected via combined dual-link single CAT cable or dual independent CAT cables connections, according to space extension deployment needs. Typically used for long-distance connection of space remote two PTZ cameras, the combined dual-link single CAT cable runs to a midspan-located CAT splitter that optimally connects to receiver-connected cameras via the shortest independent CAT cables.
Advanced and User-friendly Operation
- Collaborative Online-meeting Switching – Controllable switching of online-session USB host participants and space-deployed local and remote visual (such as camera) and audible (such as microphones or headsets) USB peripherals, allows collaborative online meeting and smooth content sharing operation among online meeting participants.
- BYOD Ease and Convenience — Connect any USB–C device as an online meeting
participant, while providing the connected device with multiple concurrent capabilities of USB 3.2 and Ethernet connection, USB-driven content sharing, and (if PD-2.0-capable) up to 60 watts of power, all via a single USB-C cable connection only.
- Auto Switcher Ease of Use — Automatically connects the plugged host to the space connected USB peripherals, according to user–configured preferences, such as last-connected host.
- Simple and Flexible Control – Remote IP-controller connection, browser operation webpage, local panel buttons, and remotely connected contact-closure buttons triggering configurable operation functions, for easy and fully flexible USB host ports selection, and switcher control.
Flexible Connectivity
- Flexible USB Connectivity – Wide Variety of USB peripheral and dual-role devices can be extended including cameras, touch screens, smart boards, hard drives, game controllers, audio devices, printers, scanners, or HID (Human Interface Devices) devices such as a mouse or keyboard.
- Built-in Intelligent Control Gateway – Remote IP-driven intelligent control of local and remote connected USB peripherals (such as PTZ cameras) and sensor devices via IP, RS-232 or I/O. Eliminating the need for an external control gateway, this feature reduces installation complexity and costs, to enable easy integration with control systems, such as Kramer Control.
- Secured Connectivity — Standard IT-grade 802.1x authentication for secured IT LAN connectivity operation.
- Comprehensive and Cost-effective Management — Local panel indication LEDs to facilitate easy local maintenance and troubleshooting. Remote IP-driven device firmware upgrade and management, via user-friendly embedded web pages and optional whole site management system, ensure lasting and field proven deployment.
- Easy and Elegant Installation — PoE powering via LAN port connection, 2-way powering to CAT-paired devices, and half 19" rack noise-free fan-cooled enclosure for under table mounting, or side-by-side mounting of 2 units in a 1U rack space, for easy and convenient deployment.
EXT3-UE-R USB Receiver
EXT3-UE-R is a comprehensive 2-way powering USB 2.0 receiver over extended-reach twisted pair CAT cable. The receiver converts the transmitted CAT signal into USB 2.0, Ethernet, RS-232 and audio signals.
EXT3-UE-R provides exceptional quality, advanced and user-friendly operation, and flexible control:
Exceptional Quality
- Comprehensive USB Extension – Plug & play USB over CAT receiver for connecting a remote USB host to the locally connected USB peripherals, employing either interrupt, bulk or isochronous USB 2.0 standard data transfer communication.
- Simple USB Peripheral Control – Remote IP-driven or serial control, via the
CAT-extended control signals of the connected USB peripherals, such as PTZ cameras and soundbars by a remote LAN-connected control system (for example, Kramer Control).
- Flexible USB Connectivity – Wide Variety of USB peripheral and dual-role devices can be extended including cameras, touch screens, smart boards, hard drives, game controllers, audio devices, printers, scanners, or HID (Human Interface Devices) devices such as a mouse or keyboard.
Advanced and User-friendly Operation
- USB Peripheral Charging – Fast USB charging of connected USB peripherals when the receiver is powered by a power supply, and standard USB charging when the receiver is powered by the transmitter via CAT.
Flexible Connectivity
- Bidirectional Ethernet Extension – LAN interface data flows in both directions, allowing network data transmission and connected-devices control.
- Bidirectional RS–232 Extension – Serial interface data flows in both directions, allowing data transmission and device control.
- Audio Extension – The transmitted analog audio line signal from the remote audio source is connected to the locally connected audio playing device.
- Comprehensive and Cost-effective Management – Local panel indication LEDs facilitate easy local maintenance and troubleshooting. Remote management of connected triggerable I/O devices (such as sensors), via user-friendly embedded web pages and optional whole site management system, ensure lasting and field proven deployment.
- Easy Installation – Single twisted–pair cable for carrying signal and power wiring. Compact TOOLS® fan-less enclosure for device-back mounting, or side-by-side mounting of 3 units in a 1U rack space with the recommended rack adapter.
EXT3-U-R USB Receiver
EXT3-U-R is a comprehensive, extended-reach CAT extender kit for USB 2.0, RS-232 and audio signals and 2-way powering over twisted pair. The EXT3-U-R transmitter converts the USB input signal into a CAT signal. The EXT3-U-R receiver converts the transmitted CAT signal into a USB signal.
EXT3-U-R provides exceptional quality, advanced and user-friendly operation, and flexible control:
Exceptional Quality
- Comprehensive USB Extender – Plug & play USB extender kit for providing extended-reach CAT signals and 2-way power over twisted pair copper infrastructures. A local USB host is auto-connected to remote-connected USB devices employing either interrupt, bulk or isochronous USB 2.0 standard data transfer communication.
- Flexible USB Connectivity – Wide Variety of USB peripheral devices can be extended including cameras, touch screens, smart boards, hard drives, game controllers, audio devices, printers, scanners, or HID (Human Interface Devices) devices such as a mouse or keyboard. Dual role and OTG (On The Go) devices such as smart phones and
tablets, connected either to a transmitter-side USB host port or receiver-side USB device port, can communication with a remote host or peripheral pairing device.
Advanced and User-friendly Operation
- Remote USB Charging – Fast USB charging of peripheral devices when the receiver is powered by a power supply, and standard USB charging when the receiver is powered by the transmitter via CAT.
Flexible Connectivity
- Bidirectional RS-232 Extension – Serial interface data flows in both directions, allowing data transmission and device control.
- Audio Extension – Send an audio signal from an audio source connected to the transmitter to an active audio playing device connected to the receiver.
- Cost-Effective Maintenance – Status LED indicators facilitate easy local maintenance and troubleshooting.
- Easy Installation – Single twisted-pair cable for signal and power wiring. Compact PicoTOOLS® fan-less enclosure for device-back mounting, or side-by-side mounting of 4 units in a 1U rack space with the recommended rack adapter.
ACC3-12-SP 1:2 CAT cable splitter
ACC3-12-SP is a passive splitter of one 4-pair signals-carrying CAT cable to two 2-pair signals-carrying CAT cables, for optimized deployment of extension copper wiring infrastructure.
Typical Applications
- Enterprise and education online meeting rooms.
- Upgrade AV meeting rooms to hybrid meeting rooms.
- Any solution with flexible connection of multiple USB hosts and local or remote room peripherals.
Controlling your SWT3-41-U-T
Control your SWT3-41-U-T directly via the front panel push buttons, or:
- Via the IP commands transmitted by a controller and touch screen system, or a browser using built-in user-friendly Web pages.
- By RS-232 serial commands transmitted by a touch screen system, PC, or a serial controller.
Defining SWT3-41-U-T 4x1 USB Switcher
This section defines SWT3-41-U-T, EXT3-UE-R, EXT3-U-R and ACC3-12-SP.
Defining SWT3-41-U-T

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1 2 3 4 5 6 USB DEVICE 1 HOST 2 HOST SELECT 1 2 3 4 A+B CAT NET STATUS SWT3-4I-U-T 4x1 USB Switcher TransmitterFigure 1: SWT3-41-U-T 4x1 USB Switcher Front Panel
| Feature | Function | ||
| 1 | USB DEVICE USB A 3.2 Ports | Connect to the USB local peripheral devices (for example, a USB camera, a soundbar, microphone and so on). | |
| 2 | HOST on USB-C 3.2 ports (1 to 2) | Connect to a USB-C host (for example, a room PC) to communicate with the USB devices (for example, a PTZ camera) that are connected to the USB device ports and connect to the LAN.For Host 1 only: Charges the connected host (that supports USB Power Delivery 2.0) up to 60W when the device is powered via the optional 12V DC power adapter. While charging, the charging icon (to the right of the connector) becomes visible and lights orange. | |
| 3 | HOST SELECT Buttons (1 to 4) | Press to select a host. | |
| 4 | A+B CAT LED | LED Status | Indicates |
| Lights green | When dual CAT combined signals are sent over the A+B port.When using CAT splitter, make sure the Dual CAT extension is set to active via SWT3-41-U-T embedded webpages. See Enabling Combined Dual CAT A+B Mode on Page 33. | ||
| 5 | NET LED | LED Status | Indicates |
| Dark | No IP address acquired. | ||
| Lights green | A valid IP address has been acquired. | ||
| Flashes green for 60s | A means to identify the device in a system, using command #IDV. | ||
| Flashes red/green | IP fallback address has been acquired. | ||
| 6 | STATUS LED | LED Status | Indicates |
| Dark | Power is off | ||
| Lights white | PSU-powered on (only).Note: This is applicable when power supply is PoE mode. | ||
| Lights yellow | PoE-powered on. | ||
| Lights green | Power is on and a source is connected. | ||
| Lights blue | Power is on, and a source and an acceptor are connected. | ||

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7 8 9 10 11 12 13 14 15 16 17 HOST USB CAT OUT PoC USB DEVICE I/O R5-232 S1 S2 G Rx Tx LAN PoE L+ L- G R+ R- AUDIO IN O RESET 12/20V DCFigure 2: SWT3-41-U-T 4x1 USB Switcher Rear Panel
| # | Feature | Function | |
| 7 | HOST USB B 3.2 Connectors (3 to 4) | Connect to a USB host (for example, a room PC) to communicate with the USB devices (for example, a PTZ camera) connected to USB device ports on this device and connect to the LAN. | |
| 8 | USB CAT OUT PoC ◀▶ | A / A+B | Connect to a compatible CAT receiver (for example an EXT3-UE-R) or a compatible CAT splitter (for example an ACC3-12-SP). |
| 9 | B | Connect to a compatible CAT receiver (for example an EXT3-UE-R). | |
| 10 | USB DEVICE | USB-A 3.2 Ports (2 to 3) | Connect to the USB local devices (for example, a USB camera, a soundbar, microphone and so on). |
| 11 | USB-C 3.2 Port (4) | Connect to the USB local devices (for example, a USB camera, a soundbar, microphone and so on).Note that this port does not provide Power delivery 2.0. | |
| 12 | I/O 2-pin Terminal Block (S1, S2, G) | Connect to:Input-triggering devices (for example, remote buttons or sensors),OROutput-triggered devices (for example, remote alarm LED indication). These GPIO ports may be configured as a digital input, digital output, or analog input ports. | |
| 13 | RS-232 3-pin Terminal Block Connector (G, Rx, Tx) | Connect to:RS-232 controlled device (for example, a PTZ USB camera) for its remote IP control by a controller (for example, an SL-240C),ORRS-232 control port of a controller (for example, an SL-240C) for extension via a CAT port,ORPC RS-232 port for controlling the device. | |
| 14 | LAN PoE◀ RJ-45 Connector | Connect to LAN. The device accepts power from the LAN port (PoE). A LAN-enabled connection on the selected USB-C port is LAN-switched via this LAN port. | |
| 15 | 12/20V DC Power Connector | Use the included +20V 6A power supply for powering the unit and charging the source device connected to the USB-C port, orFor powering the unit, without USB-C charging support, use PoE powering or an optional +12V DC 5A power adapter (purchased separately). . | |
| 16 | RESET Recessed Button | Press and hold while powering the device to reset to factory default values, including IP Settings. | |
| 17 | AUDIO IN 5-pin Terminal Block Connector | Connect to a balanced, stereo audio source (for example, from the server) for extension via the CAT ports. | |
Defining EXT3-UE-R

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18 19 20 21 USB Receiver USB DEVICE 4 LINK ON EXT3-UE-R
flowchart
graph TD
A["22"] --> B["CAT IN PoC"]
C["23"] --> D["AUDIO OUTPUT"]
E["24"] --> F["I/O RS-232"]
G["25"] --> H["L/S S2 G Rx Tx"]
I["26"] --> J["LAN PoE"]
K["27"] --> L["SETUP"]
M["28"] --> N["I2V DC"]
Figure 3: EXT3-UE-R USB Receiver Front/Rear Panel
| # | Feature | Function | |||
| 18 | USB 2 Type A Ports (1 to 3) | Connect to USB local devices (for example, a USB camera, a soundbar, microphone etc.).Ports provide standard USB device charging. | |||
| 19 | USB-C Port (4) | Connect to USB local devices (for example, a USB camera, a soundbar, microphone etc.). Port provides standard USB device charging.Note: Port does not provide Power Delivery 2.0 charging. | |||
| 20 | LINK LED | Flashes blue when a link is established. | |||
| 21 | ON LED | Lights green when locally powered by the power adapter.Lights orange when powered by PoC. | |||
| 22 | CAT IN PoC RJ-45 Connector | Connect to:One of the USB CAT OUT PoC ports on theSWT3-41-U-T OR,CAT A or CAT B on theACC3-12-SP 1:2 CAT cable splitter which can be connected to theSWT3-41-U-T. | |||
| 23 | AUDIO OUTPUT 5-pin Terminal Block Connector (L+, L-, G) | Connect to a balanced analog stereo audio line acceptor. | |||
| 24 | I/O 2-pin Terminal Block (S1 to S2) | Connect to:Input-triggering devices (for example, remote buttons or sensors),OROutput-triggered devices (for example, remote alarm LED indication).These GPIO ports may be configured via pairedSWT3-41-U-T embedded webpages, as digital input or output ports. | |||
| 25 | RS-232 3-pin Terminal Block (G, Rx, Tx) | Connect to an RS-232 controlled device (for example, the connected PTZ USB camera) to be controlled via a controller (for example, SL-240C) which is IP-connected to a pairedSWT3-41-U-T. | |||
| 26 | LAN PoE RJ-45 Connector | Connect to LAN or to an IP-controlled device (for example, the connected PTZ USB camera). The device accepts power from the LAN port. | |||
| 27 | SETUP 2-way DIP-switch | Note: All changes in DIP-Switches apply immediately. | |||
| DIP-switchName | DIP-switch# | DIP-SwitchState | StateDescription | ||
| RS-232 MODE | 1 | OFF (up)default | Programmingmode | ||
| ON (down) | Extensionmode | ||||
| For future use | 2 | Mandatory OFF (up) | |||
| 28 | 12V DC Power Connector | Connect to the power adapter. | |||
Defining EXT3-U-R

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29 30 31 32 AUDIO OUT USB Receiver LINK ON EXT3-U-R
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33 34 35 36 PROG RS-232 I2V DC LINK IN Tx Rx G Rx TxFigure 4: EXT3-U-R USB Receiver Front/Rear Panel
| # | Feature | Function |
| 29 | LINK LED | Flashes blue when a link is established. |
| 30 | AUDIO OUT 3.5mm Mini Jack | Connect to an unbalanced stereo audio acceptor. |
| 31 | USB 2 Type A Ports (1 to 4) | Connect to USB devices.Connect the receiver directly to the power adapter in order to charge USB devices. |
| 32 | ON LED | Lights green when locally powered by the power adapter. Lights orange when powered by PoC. |
| 33 | LINK IN RJ-45 Connector | Connect to the LINK OUT port on the EXT3-UE-R. |
| 34 | PROG (Tx, Rx) | 5-pin Terminal Block Connector (with common G pin) |
| 35 | RS-232 (Rx, Tx) | Press to toggle between a blank screen (blue or black) and the program display.The BLANK button can be programmed to mute the audio signal at the same time. |
| 36 | 12V DC Power Connector | Connect to the power adapter. |
Defining ACC3-12-SP

flowchart
graph TD
A["37"] --> B["CAT A+B"]
C["38"] --> D["CAT A"]
E["39"] --> F["CAT B"]
style A fill:#fff,stroke:#000
style C fill:#fff,stroke:#000
style E fill:#fff,stroke:#000
style B fill:#fff,stroke:#000
style D fill:#fff,stroke:#000
style F fill:#fff,stroke:#000
Figure 5: ACC3-12-SP 1:2 CAT cable splitter Front/Rear Panel
| # | Feature | Function |
| 37 | CAT A+B RJ-45 Port | Connect to a compatible CAT transmitter (for example an SWT3-41-U-T) so send combined signals over the A+B port. i Make sure the Dual CAT extension is set to active via CAT transmitter embedded webpages. |
| 38 | CAT A RJ-45 Port | Connect to a compatible CAT receiver (for example an EXT3-UE-R, EXT3-U-R). |
| 39 | CAT B RJ-45 Port | Connect to a compatible CAT receiver (for example an EXT3-UE-R, EXT3-U-R). |
Mounting SWT3-41-U-T, EXT3-UE-R, EXT3-U-R, and ACC3-12-SP
Mounting SWT3-41-U-T
This section provides instructions for mounting SWT3-41-U-T. Before installing, verify that the environment is within the recommended range:

- Operation temperature – 0° to 40°C (32 to 104°F).
- Storage temperature -40^ to +70^ (-40 to +158^ ).
- Humidity – 10% to 90%, RHL non-condensing.

Caution:
- Mount SWT3-41-U-T before connecting any cables or power.

Warning:
- Ensure that the environment (e.g., maximum ambient temperature & air flow) is compatible for the device.
- Avoid uneven mechanical loading.
- Appropriate consideration of equipment nameplate ratings should be used for avoiding overloading of the circuits.
- Reliable earthing of rack-mounted equipment should be maintained.
• Maximum mounting height for the device is 2 meters.
Mount SWT3-41-U-T in a rack:
- Use the recommended rack adapter (see www.kramerav.com/product/SWT3-41-U-T).
Mount SWT3-41-U-T on a surface using one of the following methods:
- Mount device with its recommended mounting accessory to the underside of the table and secure.
- Attach the rubber feet and place the unit on a flat surface.
- Mount the unit in a rack using the recommended rack adapter www.kramerav.com/downloads/SWT3-41-U-T.

Mounting EXT3-UE-R
This section provides instructions for mounting EXT3-UE-R. Before installing, verify that the environment is within the recommended range:

- Operation temperature – 0° to 40°C (32 to 104°F).
- Storage temperature -40^ to +70^ (-40 to +158^ ).
- Humidity – 10% to 90%, RHL non-condensing.
- EXT3-UE-R must be placed upright in the correct horizontal position.


Warning:
- Ensure that the environment (e.g., maximum ambient temperature & air flow) is compatible for the device.
- Avoid uneven mechanical loading.
- Appropriate consideration of equipment nameplate ratings should be used for avoiding overloading of the circuits.
- Reliable earthing of rack-mounted equipment should be maintained.
Mounting EXT3-UE-R

Mount device before connecting any cables or power.
To mount EXT3-UE-R
Mount the unit in a rack using the recommended rack adapter (see www.kramerav.com/product/EXT3-UE-R)
To mount the EXT3-UE-R on a table or shelf:
- Attach the rubber feet and place the unit on a flat surface.
- Fasten a bracket (included) on each side of the unit and attach it to a flat surface.


For more information go to www.kramerav.com/downloads/EXT3-UE-Rr
Mounting EXT3-U-R
This section provides instructions for mounting EXT3-U-R. Before installing, verify that the environment is within the recommended range:

- Operation temperature – 0° to 40°C (32 to 104°F).
- Storage temperature -40^ to +70^ (-40 to +158^ ).
- Humidity – 10% to 90%, RHL non-condensing.

Caution:
- Mount EXT3-U-R before connecting any cables or power.

Warning:
- Ensure that the environment (e.g., maximum ambient temperature & air flow) is compatible for the device.
- Avoid uneven mechanical loading.
- Appropriate consideration of equipment nameplate ratings should be used for avoiding overloading of the circuits.
- Reliable earthing of rack-mounted equipment should be maintained.
• Maximum mounting height for the device is 2 meters.
Mount EXT3-U-R in a rack:
- Use the recommended rack adapter (see www.kramerav.com/product/EXT3-U-R).
Mount EXT3-U-R on a surface using one of the following methods:
- Attach the rubber feet and place the unit on a flat surface.
- Fasten a bracket (included) on each side of the unit and attach it to a flat surface. For more information go to www.kramerav.com/downloads/EXT3-U-R.

Mounting ACC3-12-SP
This section provides instructions for mounting ACC3-12-SP. Before installing, verify that the environment is within the recommended range:

- Operation temperature – 0° to 40°C (32 to 104°F).
- Storage temperature -40^ to +70^ (-40 to +158^ ).
- Humidity – 10% to 90%, RHL non-condensing.

Caution:
- Mount ACC3-12-SP before connecting any cables.

Warning:
- Ensure that the environment (e.g., maximum ambient temperature) is compatible for the device.
- Avoid uneven mechanical loading.
- Reliable earthing of rack-mounted equipment should be maintained.
Mount ACC3-12-SP in a rack:
- Use the recommended rack adapter (see www.kramerav.com/product/ACC3-12-SP).
Mount ACC3-12-SP on a surface using one of the following methods:
- Attach the rubber feet and place the unit on a flat surface.
- Fasten a bracket (included) on each side of the unit and attach it to a flat surface. For more information go to www.kramerav.com/downloads/ACC3-12-SP.

Connecting SWT3-41-U-T

Always switch off the power to each device before connecting it to your SWT3-41-U-T. After connecting your SWT3-41-U-T, connect its power and then switch on the power to each device.

flowchart
graph TD
A["4x1 USB Switcher Transmitter"] --> B["CAT"]
B --> C["HCAT"]
B --> D["USB"]
B --> E["Audio"]
B --> F["RS-232"]
B --> G["ETH"]
B --> H["MCV-VR1"]
C --> I["Desktop PC"]
C --> J["Laptop"]
C --> K["Mouse"]
C --> L["Keyboard"]
C --> M["Hands free mic"]
C --> N["Media Player"]
C --> O["KC-VB1"]
C --> P["Power"]
D --> Q["POS"]
D --> R["POS"]
D --> S["POS"]
D --> T["POS"]
D --> U["POS"]
D --> V["POS"]
D --> W["POS"]
D --> X["POS"]
D --> Y["POS"]
D --> Z["POS"]
D --> AA["POS"]
D --> AB["POS"]
D --> AC["POS"]
D --> AD["POS"]
D --> AE["POS"]
D --> AF["POS"]
D --> AG["POS"]
D --> AH["POS"]
D --> AI["POS"]
D --> AJ["POS"]
D --> AK["POS"]
D --> AL["POS"]
D --> AM["POS"]
D --> AN["POS"]
D --> AO["POS"]
D --> AP["POS"]
D --> AQ["POS"]
D --> AR["POS"]
D --> AS["POS"]
D --> AT["POS"]
D --> AU["POS"]
D --> AV["POS"]
D --> AW["POS"]
D --> AX["POS"]
D --> AY["POS"]
D --> AZ["POS"]
D --> BA["POS"]
D --> BB["POS"]
D --> BC["POS"]
D --> BD["POS"]
D --> BE["POS"]
D --> BF["POS"]
D --> BG["POS"]
D --> BH["POS"]
D --> BI["POS"]
D --> BJ["POS"]
D --> BK["POS"]
D --> BL["POS"]
D --> BM["POS"]
D --> BN["POS"]
D --> BO["POS"]
D --> BP["POS"]
D --> BQ["POS"]
Figure 6: Connecting to the SWT3-41-U-T

In (Figure 6) SWT3-41-U-T is connected to dual receivers using a CAT splitter to save CAT cables wiring expenses. If not CAT splitter is required, SWT3-41-U-T can connect directly to either one of the required receivers EXT3-UE-R and EXT3-U-R based on needs.
To connect SWT3-41-U-T as illustrated in the example in Figure 6:

- USB devices that consume power greater than the power supplied by connected port (see Technical Specifications), should be powered by an external power supply.
- Connect the HOST USB-C 3.2 ② port to a laptop.
- Connect the HOST USB-B 3.2 ⑦ port to a room PC.
- Connect the local USB DEVICE ports ①, ⑩, ⑪ to USB devices (for example, USB DEVICE 2 to a mouse, USB DEVICE 3 to a keyboard and USB DEVICE 4 to a hands-free mic).
-
Connect a balanced stereo audio source (for example, media player) to the AUDIO IN 5-pin terminal block connector ^17
-
Connect the USB CAT OUT A / A+B PoC RJ-45 port ⑧ on the SWT3-41-U-T, to the CAT A+B Input RJ-45 port ③6 on the ACC3-12-SP.
- Connect the CAT A RJ-45 Output Ports ⑧ on the ACC3-12-SP, to the LINK IN RJ-45 ports ⑳ & ⑴ on the EXT3-UE-R and EXT3-U-R, correspondingly.
- Connect the Outputs on EXT3-U-R as follows:
- Connect the USB DEVICE ports ③1 to USB devices (for example, USB DEVICE 1 to a Touch TV, USB DEVICE 2 to a PTZ camera and USB DEVICE 3 to a smartboard).
- Connect the AUDIO OUT 3.5mm mini jack ③0 to an unbalanced stereo audio acceptor (for example, active speakers).
-
Connect the Outputs on EXT3-UE-R as follows:
-
Connect the USB DEVICE ports ⑱ to USB devices (for example, USB 1 to a touch TV, USB 3 to a PTZ camera).
- Connect the AUDIO OUTPUT 5-pin terminal block connector 23 to a balanced stereo audio acceptor (for example, active speakers).
-
Connect the I/O 2-pin terminal block connector (24) to a triggering and/or triggered GPIO acceptor (for example, I/O 2 to occupancy detector) or a remote button (for example, a host selector).
-
Control the devices:
-
On the SWT3-41-U-T, connect a controller (for example, KC-VB1 room controller) to the LAN PoE ◀ RJ-45 port ⑭, or to the RS-232 port ⑬.
- On EXT3-U-R receiver side, connect the RS-232 port ⑯ to a PTZ camera (send serial commands from SL-240C to the camera via receiver RS-232 port).
-
On EXT3-U-R receiver side, connect the LAN PoE ◀ RJ-45 port to a PTZ camera (send IP commands from SL-240C to the camera via receiver LAN port).
-
When not PoE powered, connect the power adapter to SWT3-41-U-T and to the mains electricity.

To charge the device that is connected to the host USB-C port, you need to use a power adapter for powering the SWT3-41-U-T switcher transmitter.
Connecting the Output to a Balanced/Unbalanced Stereo Audio Acceptor
The following are the pinouts for connecting the output to a balanced or unbalanced stereo audio acceptor:

L+ L- G R+ R-
Figure 7: Connecting to a Balanced Stereo Audio Acceptor

L+ L- G R+ R-
Figure 8: Connecting to an Unbalanced Stereo Audio Acceptor
Connecting a Balanced/Unbalanced Stereo Audio Source to the Balanced Input
The following are the pinouts for connecting a balanced or unbalanced stereo audio source to the balanced input:

text_image
L+ L- G R+ R-Figure 9: Connecting a Balanced Stereo Audio Source to the Balanced Input

text_image
L+ L- G R+ R-Figure 10: Connecting an Unbalanced Stereo Audio Source to the Balanced Input
Connecting to Devices via RS-232
You can connect to SWT3-41-U-T/EXT3-UE-R/EXT3-U-R via an RS-232 connection using, for example, a PC.
SWT3-41-U-T, for example, features an RS-232 3-pin terminal block connector allowing the RS-232 to control SWT3-41-U-T.
Connect the RS-232 terminal block on the rear panel of SWT3-41-U-T to a PC/controller, as follows:
From the RS-232 9-pin D-sub serial port connect:
- Pin 2 to the TX pin on the SWT3-41-U-T RS-232 terminal block
- Pin 3 to the RX pin on the SWT3-41-U-T RS-232 terminal block
- Pin 5 to the G pin on the SWT3-41-U-T RS-232 terminal block
RS-232 Device
SWT3-41-U-T

text_image
Pin 5 Ground Pin 3 Rx Pin 2 TxRS-232
G Rx Tx

Operating and Controlling SWT3-41-U-T
Principles of Operation
This section covers the following topics:
• Flexible SWT3-41-U-T Auto Switching Policy on page 19.
• Online Meeting Systems Integration on page 20.
- Routing IP-Driven Control Signals via Built-in Control Gateway on page 20.
- Muting Extended Audio Signals on page 21.
• Flexible Remote Buttons Control on page 21.
Flexible SWT3-41-U-T Auto Switching Policy
Set the USB host switching to connected USB devices policy to:
- Manual – Select a USB host manually and switching occurs whether a USB host live signal is present or not.
- Auto – Auto Switching selection is performed in either Last Connected or Priority policy.
In Last Connected policy:
If a signal is plugged in this mode, SWT3-41-U-T will switch to it.
- If the signal on the current input is lost, SWT3-41-U-T automatically selects the last connected input.

The auto-switching delay depends on the configurable signal-lost timeout
In Priority policy:
- If a signal with a higher priority than the current one is plugged in this mode, SWT3-41-U-T will switch to it.
- When the input sync signal is lost for any reason, the input with a live signal and next in priority is selected automatically.

The auto-switching delay depends on the configurable signal-lost timeout. Inputs priority is configurable; the default setting is USB-C 1 → USB C 2 → USB 3 → USB 4.

In both Last Connected and Priority modes, manually selecting an input (using the front panel, remote or web UI input select button) overrides automatic selection
See Setting the USB Auto-Switching Policy on page 30.
Online Meeting Systems Integration
USB device ports can be set to auto-disconnect following presenter disconnection, to allow smooth integration and auto-activation of connected online meeting room systems.
See Auto-disconnecting a USB Device on Inactive Host on page 37.
Routing IP-Driven Control Signals via Built-in Control Gateway
Remote IP connected clients can communicate and control (send commands, and receive responses and notifications) via the LAN:
-
IP commands/responses via the LAN-connected SWT3-41-U-T and CAT-connected EXT3-UE-R LAN extension, to/from the EXT3-UE-R LAN-connected devices.
• Via the SWT3-41-U-T built-in and I/O control gateway: -
RS-232 commands, to control devices connected to SWT3-41-U-T, EXT3-UE-R and EXT3-U-R RS-232 control ports. The built-in control gateway sends the serial control commands (converted from the client received IP messages) to the locally and/or remotely connected serially controlled devices and distributes their received responses to all connected clients.
- Send or receive I/O digital triggers or detected triggers, to I/O control devices connected to SWT3-41-U-T and EXT3-UE-R I/O control ports. The built-in control gateway sends the I/O control commands (converted from the client received IP messages) to the locally and/or remotely connected I/O controlled devices and distributes their received detected triggers to all connected clients.

EXT3-UE-R I/O ports control and management via LAN is done via SWT3-41-U-T LAN connection and web-UI only.
(Figure 11) shows the SWT3-41-U-T built-in control gateway connection for control of its local and remote EXT3-UE-R control ports. The Kramer Control controller is connected to the switcher via LAN, sends IP commands to the switcher control gateway over the LAN connection, to send control messages to, and receive control responses from:
- The PTZ Camera connected to the EXT3-U-R receiver via the RS-232 port.
- The PTZ Camera connected to the EXT3-UE-R receiver via the LAN.
- The Occupancy Detector connected to the EXT3-UE-R receiver via the I/O ports.
- The Soundbar is connected to receiver EXT3-UE-R via the RS-232 port.
- The Blinds are locally connected to SWT3-41-U-T via the I/O ports.

flowchart
graph TD
A["Blinds"] --> B["CAT"]
C["SL-240C"] --> B
D["Occupancy Detector"] --> E["USB Receiver"]
F["Soundbar"] --> G["USB Receiver"]
H["PTZ Camera"] --> I["USB Receiver"]
J["PTZ Camera"] --> K["USB Receiver"]
L["RS-232"] --> M["USB"]
N["RS-232"] --> O["USB"]
P["RS-232"] --> Q["USB"]
R["RS-232"] --> S["USB"]
T["RS-232"] --> U["USB"]
V["RS-232"] --> W["USB"]
X["RS-232"] --> Y["USB"]
Z["RS-232"] --> AA["USB"]
AB["RS-232"] --> AC["USB"]
AD["RS-232"] --> AE["USB"]
AF["RS-232"] --> AG["USB"]
AH["RS-232"] --> AI["USB"]
AJ["RS-232"] --> AK["USB"]
AL["RS-232"] --> AM["USB"]
AN["RS-232"] --> AO["USB"]
AP["RS-232"] --> AQ["USB"]
AR["RS-232"] --> AS["USB"]
AT["RS-232"] --> AU["USB"]
AV["RS-232"] --> AW["USB"]
AX["RS-232"] --> AY["USB"]
Figure 11: Controlling remotely via SWT3-41-U-T Control Gateway
Muting Extended Audio Signals
Sterio audio signal is extended from the switcher transmitter to both receivers, to allow easy audio and music distribution within the same space or separate rooms. Each extended audio signal can be independently muted, to enable a simple end-user control on the distributed audio signals.
See Muting the Extended Audio Signal on page 29.
Flexible Remote Buttons Control
Remote contact-closure buttons can be connected to the I/O ports, for easy end user control of device functions by button press and release operation. Flexible configuration of button press/release actions and latching (default) or momentary operation mode, enable simple and custom control according to user needs.
See Configuring Remote Buttons on page 48.
Using Front Panel Buttons
SWT3-41-U-T front and rear panel buttons enable the following actions:
- Selecting a HOST INPUT.
- Resetting device to its factory settings (for additional instructions on resetting and resetting device (see Resetting and Restarting Device on page 34).
Operating via Ethernet
You can connect to SWT3-41-U-T via Ethernet using either of the following methods:
- Directly to the PC using a crossover cable (see Connecting Ethernet Port Directly to a PC on page 22).
- Via a network switch or router, using a straight-through cable (see Connecting Ethernet Port via a Network Hub or Switch on page 24).

If you want to connect via a router and your IT system is based on IPv6, speak to your IT department for specific installation instructions.
Connecting Ethernet Port Directly to a PC
You can connect the Ethernet port of SWT3-41-U-T directly to the Ethernet port on your PC using a crossover cable with RJ-45 connectors.

This type of connection is recommended for identifying SWT3-41-U-T with the factory configured default IP address.
After connecting SWT3-41-U-T to the Ethernet port, configure your PC as follows:
- Click Start > Control Panel > Network and Sharing Center.
- Click Change Adapter Settings.
- Highlight the network adapter you want to use to connect to the device and click Change settings of this connection.
The Local Area Connection Properties window for the selected network adapter appears as shown in Figure 12.

text_image
Local Area Connection Properties Networking Sharing Connect using: Intel(R) 82579V Gigabit Network Connection Configure... This connection uses the following items: Client for Microsoft Networks Microsoft Network Monitor 3 Driver QoS Packet Scheduler File and Printer Sharing for Microsoft Networks Internet Protocol Version 6 (TCP/IPv6) Internet Protocol Version 4 (TCP/IPv4) Link-Layer Topology Discovery Mapper I/O Driver Link-Layer Topology Discovery Responder Install... Uninstall Properties Description TCP/IP version 6. The latest version of the internet protocol that provides communication across diverse interconnected networks. OK CancelFigure 12: Local Area Connection Properties Window
- Highlight either Internet Protocol Version 6 (TCP/IPv6) or Internet Protocol Version 4 (TCP/IPv4) depending on the requirements of your IT system.
- Click Properties.
The Internet Protocol Properties window relevant to your IT system appears as shown in Figure 13 or Figure 14.

text_image
Internet Protocol Version 4 (TCP/IPv4) Properties General Alternate Configuration You can get IP settings assigned automatically if your network supports this capability. Otherwise, you need to ask your network administrator for the appropriate IP settings. Obtain on IP address automatically Use the following IP address: IP address: . Subnet mask: . Default gateway: . Obtain DNS server address automatically Use the following DNS server addresses: Preferred DNS server: . Alternate DNS server: . Validate settings upon exit Advanced... OK CancelFigure 13: Internet Protocol Version 4 Properties Window

text_image
Internet Protocol Version 6 (TCP/IPv6) Properties General You can get IPv6 settings assigned automatically if your network supports this capability. Otherwise, you need to ask your network administrator for the appropriate IPv6 settings. Obtain an IPv6 address automatically Use the following IPv6 address: IPv6 address: Subnet prefix length: Default gateway: Obtain DNS server address automatically Use the following DNS server addresses: Preferred DNS server: Alternate DNS server: Validate settings upon exit Advanced... OK CancelFigure 14: Internet Protocol Version 6 Properties Window
- Select Use the following IP Address for static IP addressing and fill in the details as shown in Figure 15.
For TCP/IPv4 you can use any IP address in the range 192.168.1.1 to 192.168.1.255 (excluding default 192.168.1.39 fallback address) that is provided by your IT department.

text_image
Internet Protocol Version 4 (TCP/IPv4) Properties General You can get IP settings assigned automatically if your network supports this capability. Otherwise, you need to ask your network administrator for the appropriate IP settings. Obtain on IP address automatically Use the following IP address: IP address: 192 . 168 . 1 . 2 Subnet mask: 255 . 255 . 255 . 0 Default gateway: | Obtain DNS server address automatically Use the following DNS server addresses: Preferred DNS server: . Alternate DNS server: . Validate settings upon exit Advanced... OK CancelFigure 15: Internet Protocol Properties Window
-
Click OK.
-
Click Close.
Connecting Ethernet Port via a Network Hub or Switch
You can connect the Ethernet port of SWT3-41-U-T to the Ethernet port on a network switch or router using a straight-through cable with RJ-45 connectors.
Configuring Ethernet Port
You can set the Ethernet parameters via the embedded Web pages.
Discovering and acquiring IP address
SWT3-41-U-T includes IP address auto-acquiring policy via LAN-connected DHCP server by default. When no DHCP server is detected, a fallback static IP address of 192.168.1.39, and 255.255.255.0 subnet mask (class C), is assigned until an IP address is acquired via the DHCP server.
For more information, refer to Product Page Technical Note in www.kramerav.com/product/SWT3-41-U-T
Using Embedded Web Pages
SWT3-41-U-T enables you to configure settings via Ethernet using built-in, user-friendly web pages. The Web pages are accessed using a Web browser and an Ethernet connection.

To apply the USB-C type change, device power cycle must be performed.

USB-C ethernet connection is disabled by default and is enabled only by API command. (see Protocol 3000 Commands on page 65).
Before attempting to connect:
• Perform the procedure in (see Operating via Ethernet on page 22).
- Ensure that your browser is supported.
The following operating systems and Web browsers are supported:
| Operating Systems | Browser |
| Windows 10 and higher | Edge |
| Chrome | |
| Mac Safari | |
| iOS Safari | |
| Android N/A |

If a web page does not update correctly, clear your Web browser's cache.

Check that Security/firewalls are not blocking HTTP traffic between the device and the user PC.
To access the web pages:
- Enter the IP address of the device in the address bar of your internet browser (default = 192.168.1.39).
If security is enabled, the Login window appears.

text_image
Security Status Would you like to disable security? Enter password to disable the security. CANCEL OKFigure 16: Embedded Web Pages Login Window
- Enter the Username (default = Admin) and Password (default = Admin) and click Sign in. The default web page appears.

text_image
kramer SWT3-41-U-T Routing Devices USB-C USB Device Hosts USB-C 1 USB Host USB-C 2 USB Host USB USB 3 USB Host USB 4 USB Host CAT-A Audio Mute Off CAT-B Audio Mute OffFigure 17: Default Landing Page
- Click the arrow at the top of the navigation list to view the menu items in detail.

text_image
kramer SWT3-41-U-T OPERATION Routing SETTINGS Auto switching Device Control gateway DIAGNOSTICS Status ADMINISTRATION Security About Routing Devices USB-C USB Device Hosts USB-C 1 USB Host USB-C 2 USB Host USB USB USB 3 USB Host USB 4 USB Host CAT-A Audio Mute Off CAT-B Audio Mute OffFigure 18: Pages and Tabs Navigable List
- Click the Navigation Pane on the left side of the screen to access the relevant web page.
SWT3-41-U-T web pages enable performing the following actions:
• Operation on page 29.
- Settings on page 30.
• Diagnostics on page 50.
• Administration on page 50.
• Viewing the About Page on page 56.
Operation
Routing Signals
This section details the following actions:
- Routing a Host to Devices on page 29.
- Muting the Extended Audio Signal on page 29.
Routing a Host to Devices
Route any of the four USB hosts to all connected USB-C devices.
To route the Host to the Devices:
- Go to the Routing Settings tab.

text_image
Routing Devices USB-C USB Device Hosts USB-C 1 USB Host ψ USB USB-C 2 USB Host USB 3 USB Host USB 4 USB Host CAT-A Audio Mute Off CAT-B Audio Mute OffFigure 19: Routing Page
- Perform the following functions:
- Click a Host/Devices cross-point.

A green light button indicates a connected source.
A host is routed to the devices.
Muting the Extended Audio Signal:

This feature only works when SWT3-41-U-T is connected to a receiver(s).
To mute the extended audio signal:
- Go to the Routing Settings tab.
- Next to CAT-A /B Audio Mute press to toggle switch to ON.
CAT-A Audio Mute
CAT-B Audio Mute

Off

Off
Figure 20: Muting Extended Audio Signals
Extended audio signal is muted.
Settings
This section details the following action:
• USB Switching Properties on page 30.
• Device Properties on page 31.
- Settings Networking Properties on page 36.
• Control Gateway Properties on page 39.
USB Switching Properties
This section details the following action:
- Setting the USB Auto-Switching Policy on page 30.
Setting the USB Auto-Switching Policy
To set the USB auto-switching policy:
- Go to the Auto switching tab.
- Next to the Selection Mode drop-down box, select the auto switching policy: Manual, Last Connected or Priority.
USB auto-switching policy is set.
To change USB Host Input Priorities:
- Go to the Auto switching tab.
-
Next to the Selection Mode drop-down box, select Priority.
-
Click and drag a host input between high and low to change the priorities.

flowchart
graph TD
A["Selection Mode Manual"] --> B["High"]
A --> C["Low"]
B --> D["USB-C 1"]
B --> E["USB-C 2"]
B --> F["USB 3"]
B --> G["USB 4"]
C --> H["Drag to change the priority."]
I["CANCEL"] --> J["SET USB"]
Figure 21: Changing Input Priorities
4. Click SET USB.
USB Host Input priorities are set.
Device Properties
This section details the following actions:
• Device Profile and Maintenance on page 32.
• Changing Device Name on page 32.
• Upgrading Firmware on page 33.
- Resetting and Restarting Device on page 34.
• Identifying Your Device on page 35.
Device Profile and Maintenance
Changing Device Name
SWT3-41-U-T enables you to change the DNS name of the device.
To change the device name:
- Go to the Device > General tab.

text_image
kramer SWT3-41-U-T Device > General General Network USB Time and Date Device Name SWT3-41-U-T Model SWT3-41-U-T Serial Number 0 Firmware Version 1.0.64637 Update Combine Dual CAT A+B Off GLOBAL SYSTEM SETTINGS DEVICE RESTART EXPORT FLAG ME FACTORY RESET IMPORTFigure 22: Device > General Page
- Under General Preferences, change the device name and click SAVE.
The device name is changed.
Upgrading Firmware
To upgrade the device firmware:
- Go to the Device > General tab (Figure 22).
- Under General, click Update, open the relevant firmware file, and follow the instructions. The upgrade process (Figure 23) takes approximately 30-60 seconds.

- During FW upgrade, the device continues to operate, but the device UI and protocol 3000 communication are inactive. When device restarts, the status LED is lit and USB host and devices connection signal is disconnected until restart completes.
Firmware is updated.

flowchart
graph LR
A["Firmware Upgrade"] --> B["1 Uploading (Firmware)"]
B --> C["2 Upgrading"]
C --> D["3 Restarting"]
Figure 23: Firmware Upgrade Process
Enabling Combined Dual CAT A+B Mode
The SWT3-41-U-T enables you to connect it to a compatible CAT receiver (EXT3-UE-R) or compatible CAT splitter (ACC3-12-SP). When you select Combine Dual CAT A+B, the SWT3-41-U-T sends combined signals over the A+B Port.

Any device connected to the CAT B Port will not function while this feature is active.
To configure Dual CAT A+B Mode
- Go to the Device > General tab (Figure 22).
- Next to Combine Dual CAT A+B, press to toggle On.
3. Click SAVE.
Dual CAT A+B Mode indication is displayed on the top bar.

text_image
kramer SWT3-41-U-T Dual Mode CAT A+B Device > General General Network USB OPERATION Routing SETTINGS Auto switching Device Control gateway DIAGNOSTICS Status ADMINISTRATION Device Name SWT3-41-U-T Model SWT3-41-U-T Serial Number 0 Firmware Version 1.0.64637 Update Combine Dual CAT A+B OnFigure 24: Device Settings > Dual Mode CAT A+B
Dual CAT A+B Mode is enabled.
Resetting and Restarting Device
Two types of resets can be performed:
- Restart – Reboots your device and keeps all your device settings, including the IP address and password.
- Reset – Reboots your device and restores all factory settings including input/output definitions, switching configuration, IP address and password (a DHCP-acquired IP address is retained).
To restart the device:
- Click DEVICE RESTART on the Device > General page (Figure 22).
To perform a factory reset on the device, use one of the following actions:
- Click FACTORY RESET on the Device > General page (Figure 22).
- Using protocol 3000 commands, send FACTORY command then RESET commands.
- On the rear panel, press and hold the RESET button while connecting the power for several seconds.
Exporting and Importing a Configuration File
SWT3-41-U-T enables you to export and store (in connected browsing PC storage) a configuration file, that records all current device settings except the routing operation setup. The stored file can then be imported to the same or different SWT3-41-U-T device to load the recorded settings, for configuration backup and/or solution-replication purposes.
Exporting a Configuration File
To export a configuration file of the current device settings:
- Go to the Device > General page (Figure 22).
- Under Global System Settings, click EXPORT.
- Select the storage location on your computer to save the configuration file and click SAVE.
The configuration file is exported and saved.
Importing a Configuration File
To import a configuration file of the current device settings:
- Go to the Device > General page (Figure 22).
- Under Global System Settings, click IMPORT.
- Select the relevant configuration file from your computer storage and click SAVE.
The configuration file is imported and the device restarts with the settings from the configuration file.
Identifying Your Device
To identify the device using a supporting discovery system:
- Go to the Device > General page (Figure 22).
- Under Global System Settings, click FLAG ME. NET LED flashes.

FLAG ME indication turns off after 60 seconds.
The device is identified by the discovery system.
Settings Networking Properties

By default, DHCP is set to on. The IP address shows the actual IP address acquired from the DHCP server, or the auto-acquired fallback IP address when there is no DHCP server detection.
To configure network settings:
- Go to the Device > General page (Figure 22).
- Select the Network tab.
The network page appears.

text_image
Device > Network General Network DHCP On MAC Address 00-1d-56-02-ee-c5 IP Address 192.168.57.80 Mask Address 255.255.0.0 Gateway Address 192.168.0.254
text_image
Device > Network General Network DHCP Off MAC Address 00-1d-56-02-ee-c5 IP Address 192.168.57.80 Mask Address 255.255.0.0 Gateway Address 192.168.0.254Figure 25: Device Settings > Network Page (DHCP On/DHCP Off)
- Change settings as needed.
If required, Set to DHCP (default) or static IP address resolution modes.
- When in Static IP mode, perform the following actions:
■ Change the IP address.
■ Change the Mask address.
■ Change the Gateway address.
■ Define UDP/TCP port numbers.
Network settings are defined.
Enabling/Disabling USB Ethernet Connection

USB-C ethernet connection is disabled by default and is enable only by command. (see Protocol 3000 Commands on page 65).
Auto-disconnecting a USB Device on Inactive Host
When a host becomes inactive, you can automatically disconnect one or multiple USB devices.
To define auto-disconnection:
- Go to the Device > General page (Figure 22).
- Select the USB tab.

text_image
kramer SWT3-41-U-T Device > USB General Network USB Device Auto-Disconnection On inactive host Device Port Local 1 On CAT-A 2 On CAT-B 3 On All Off All OnFigure 26: USB Page – USB Device Auto-Disconnection
- For each USB Device Port, select the Local device ports on the SWT3-41-U-T; or select CAT-A / CAT-B for the devices located on the paired receivers.
- set the auto disconnection status to On or Off. You can also Select All Off or All On to set all device ports to off or on, respectively.
- Click SAVE.
USB devices are set for connected devices on local transmitter or remote receivers.
Setting Time and Date
You can sync the device time and date to any server around the world.
To sync device time and date to a server:
- In the Navigation pane, click Device. The General tab in the Device page appears.
- Select the Time and Date tab. The Time and Date tab appears.

text_image
kramer SWT3-41-U-T Device > Time and Date General Network USB Time and Date Date 1/5/185 Time 23:44:49 Time Location (GMT+00:00) Greenwic... Daylight Savings Time Yes No Use Time Server (NTP) Off Time Server Address 123 6 15 30 Server Status Unreachable Sync Every Day at (0-23) 0Figure 27: Device Settings – Time and Date Tab
- Set the Date and Time.
- Select the Time Location.
- In the Use Time Server (NTP) drop-down box, click:
■ Disabled to disable the time server.
■ Manual to enable time server (NTP).
- If enabled, type in server information:
- Enter the time server address.
■ Set sync frequency (every 0 to 23 days).
7. Click SAVE for any change.
The devices date and time are synchronized to the server address entered.
Control Gateway Properties
This section details the following actions:
- Setting Serial Port Properties on page 39.
- Configuring Local I/O (GPIO) Ports on page 43.
- Configuring a Digital Output I/O Type on page 44.
- Configuring Remote Receiver I/O (GPIO) Ports on page 46.
• Defining and Testing Commands via Action Editor on page 47. - Configuring Remote Buttons on page 48.
Setting Serial Port Properties
SWT3-41-U-T enables configuring the RS-232 port in one of the following ways:
• Controlling the SWT3-41-U-T on page 39.
• Controlling a Local External Device on page 40.
• Extending Local RS-232 Port to Remote Receiver RS-232 Port on page 41.
• Controlling Remote Devices Connected to the Receiver on page 42.
Controlling the SWT3-41-U-T
To set the RS-232 port to control the device:
- Go to the Control Gateway tab. The Serial Ports tab appears.

text_image
kramer SWT3-41-U-T Control gateway > Serial Ports Serial Ports 10 IO > Action Editor Local CAT-A CAT-B SERIAL PORT 1 PROPERTIES Device Serial Mode RS-232 Function Control Gateway Manual Extension Serial configuration Parity None Data Bits 8 Baud Rate 115200 Stop Bits 1Figure 28: RS-232 for Device Control
- Next to Function, select Control.
- Click SAVE.
RS-232 port controls the SWT3-41-U-T.
Controlling a Local External Device
Control a locally connected external device via an IP-connected Controller (for example SL-240C that is connected via LAN)
To set the RS-232 port to control an external device:
- Go to the Control Gateway tab. The Serial Ports tab appears.
- Next to Function, select Gateway.

text_image
kramer SWT3-41-U-T Control gateway > Serial Ports Serial Ports 10 IO > Action Editor Local CAT-A CAT-B SERIAL PORT 1 PROPERTIES Device Serial Mode RS-232 Function Control Gateway Manual Extension Serial configuration Parity None Data Bits 8 Baud Rate 115200 Stop Bits 1Figure 29: Gateway control of local RS-232 port
- Define the external device RS-232 settings (Parity, Data Bits, Baud Rate and Stop Bits).
- Click Save.
The Advanced Settings tab appears.
- Select either UDP or TCP port.
- Click SAVE.
RS-232 port controls locally connected external device via gateway.
Extending Local RS-232 Port to Remote Receiver RS-232 Port
Enable RS-232 port extension over CAT link with bi-directional serial communication.
To set the local RS-232 port extension to the receiver RS-232 port
- Go to the Control Gateway page. The Serial Ports tab appears.
- Next to Function, select Extension.

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kramer SWT3-41-U-T Control gateway > Serial Ports Serial Ports 10 IO > Action Editor Local CAT-A CAT-B SERIAL PORT 1 PROPERTIES Device Serial Mode RS-232 Function Control Gateway Manual Extension Serial configuration Parity None Data Bits 8 Baud Rate 115200 Stop Bits 1 CAT Link A BFigure 30: Local RS-232 port extension
- Define the RS-232 communication settings (Parity, Data Bits, Baud Rate and Stop Bits).
- Select link of paired receiver (CAT Link A / B).
- Click SAVE.
RS-232 port extension with bi-directional communication is enabled.
Controlling Remote Devices Connected to the Receiver
Control an external device, remotely connected to the receiver, via an IP-connected Controller to SWT3-41-U-T (for example KC-VB1 that is connected via LAN).
To set the receiver RS-232 port to control a connected external device:
- Go to the Control Gateway page. The Serial Ports tab appears.
- In the left-hand side of the screen, select CAT-A or CAT-B.
- Next to Function, select Gateway.

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kramer SWT3-41-U-T Control gateway > Serial Ports Serial Ports 10 IO > Action Editor Local CAT-A CAT-B SERIAL PORT 1 PROPERTIES Device Serial Mode RS-232 Function Gateway Manual Serial configuration Parity None Data Bits 8 Baud Rate 9600 Stop Bits 1Figure 31: Gateway control of remote receiver RS-232 port
- Define the paired-receiver RS-232 settings (Parity, Data Bits, Baud Rate and Stop Bits).
- Click SAVE.
The TUNNELING ADVANCED PROPERTIES screen appears.

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TUNNELING ADVANCED PROPERTIES Protocol TCP UDP IP Port 5001 TCP Keep alive 10 Send replies to new client by default Bits On CLOSEFigure 32: Setting Tunneling Advanced Properties
- Select either TCP or UDP port.
- Click up/down arrows to select IP Port for sending commands to RS-232.
- Click up/down arrows to select desired seconds for TCP Keep alive.
-
Press to toggle ON Send replies to new clients by default Bits.
-
Click CLOSE.
-
Click SAVE.
RS-232 port controls via gateway a remote external device connected to the receiver RS-232 port.
Configuring Local I/O (GPIO) Ports
The 2 local I/O ports can control devices such as sensors, door locks, remote contact-closure buttons, audio volume and lighting control devices and can be configured via the webpages.

To enable I/O operations, Remote Button must be set to Off.
To configure an I/O port:
- In the Navigation pane, click Control Gateway. The Serial Ports tab in the Device Settings page appears.
- Select the IO tab. The IO tab appears.

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Serial Ports IO 1 IO 2 CAT-A IO 1 CAT-A IO 2 CAT-B IO 1 CAT-B IO 2 IO 1 PROPERTIES Remote Button Off State ON State OFF Momentary None None I/O Type Analog Input Digital Input Digital Output Pull-up Resistor Disabled Threshold VDC Range Low: 800 High: 2200 Read Current Step: Low Voltage: 0mVFigure 33: Local I/O ports settings tab – Digital Input Type
-
Select the local I/O port to be configured (IO 1 or IO 2).
-
Select one of the following I/O types:
- Digital Input (default setting) (see Configuring a Digital Input I/O Type on page 44).
■ Digital Output (see Configuring a Digital Output I/O Type on page 44).
- Analog Input (see Configuring an Analog Input I/O Type on page 45).

The settings available on the page change depending on which trigger type is selected.
- Click SAVE after setting the selected I/O type.
Configuring a Digital Input I/O Type
The Digital Input trigger mode reads the digital input of an external sensor device that is connected to the I/O port. It detects High (upon passing Max threshold from Low state) or Low (upon passing Min threshold from High state) port states according to the user defined voltage threshold levels.
To configure a digital input I/O type:
- On the IO tab, select Digital Input next to I/O Type.
The Digital Input options appear.
- Select one of the following for the Pull-up resistor setting:
- Disabled
Suitable, for example, for a high temperature alarm that exceeds the maximum voltage threshold. When the pull-up resistor is disabled, the port state is low and to be triggered it must be pulled high by the externally connected sensor.
- Enabled – Detection of an open circuit as High, or a short to ground as Low.
This is suitable for example, for a pushbutton switch (connecting one terminal of the switch to ground, and the other to the input) or for an alarm closing a circuit that activates a series of actions. When the pull-up resistor is enabled, the port state is high, and to be triggered it must be pulled low by the externally connected sensor.
- Set the Threshold VDC Low and High Range (threshold voltage at which the port changes state).
- Click Read to refresh port status information.
- Click SAVE.
Digital input I/O type is configured.
Configuring a Digital Output I/O Type
To configure a digital output I/O type:
- On the IO tab, select Digital Output next to I/O type.
A warning message appears.

Warning
When selecting Digital Output and the pull-up resistor is disabled, you must install a current-limiting resistor to prevent damage to the port.
OK
Figure 34: Digital Output Warning
-
Make sure to follow the instructions in this warning.
-
Click OK. The Digital Output options appear.

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Serial Ports IO 1 IO 2 CAT-A IO 1 CAT-A IO 2 CAT-B IO 1 CAT-B IO 2 IO 1 PROPERTIES Remote Button Off State ON None State OFF None Momentary I/O Type Analog Input Digital Input Digital Output Pull-up Resistor Disabled Current Status LowFigure 35: GPIO Settings Page – Digital Output I/O Type
- Select one of the following for the Pull-up resistor setting:
■ Pullup resistor set to Enabled:
The port can be used for controlling devices that accept a TTL signal such as for powering LEDs. The voltage output is TTL positive logic: high: >2.4V; low: < 0.5V.
When the pull-up resistor is enabled, the port state is high. For the state to be low, you must select Low for the Current Status.
■ Pullup resistor Disabled:
The port is used for controlling external devices such as room or light switches. The external source device determines the voltage output; the maximum voltage is 30V DC and the maximum current is 100mA.
When the pull-up resistor is disabled, the port state is low. For the state to be high, select High for the Current Status.

Make sure that the current in this configuration does not exceed 100mA.
- Click SAVE.
Digital Output I/O type is configured.
Configuring an Analog Input I/O Type
When selectin the Analog Input I/O type, the port is triggered by an external analog device, such as a volume control device. The trigger is activated once when the detected voltage is within the 0 to 30V DC voltage range.
To configure an analog input I/O type:
- On the I/O tab, select Analog Input next to I/O type.

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Serial Ports IO 1 IO 2 CAT-A IO 1 CAT-A IO 2 CAT-B IO 1 CAT-B IO 2 IO 1 PROPERTIES Remote Button Off State ON State OFF None None Momentary I/O Type Analog Input Digital Input Digital Output Maximum Reported Steps: 1Figure 36: Local I/O ports settings tab - Analog Input Type
-
Enter or use the arrows to scroll to a value (1–100) for the Maximum reported steps. This value is the number of steps that the analog input signal is divided into. To calculate the voltage of each step, use the following formula:
Voltage of one step = 30V / number of steps. -
Click SAVE.
Analog input I/O type is configured.
Configuring Remote Receiver I/O (GPIO) Ports
The 4 remote I/O ports, on the paired receivers, can control devices connected to a receiver, such as sensors, door locks and lighting control devices, and can be configured via SWT3-41-U-T webpages.
To configure an I/O port:
-
In the Navigation pane, click Control Gateway. The Serial Ports tab in the Device Settings page appears.
-
Select the IO tab. The IO tab appears.

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IO 1 IO 2 CAT-A IO 1 CAT-A IO 2 CAT-B IO 1 CAT-B IO 2 IO 2 PROPERTIES I/O Type Digital Input Digital Output Pull-up Resistor Disabled Threshold VDC Range Low: 800 High: 2200 Read Current Step: HighFigure 37: I/O Ports Settings Page
- Select the CAT-A or CAT-B I/O port to be configured (IO 1 or IO 2).
- Select one of the following I/O types:
Digital Input (default setting) (see Configuring a Digital Input I/O Type on page 44).
- Remote buttons are not configurable on remote I/O ports.
- To Configure Remote buttons, refer to Configuring Remote Buttons on page 48.
■ Digital Output (see Configuring a Digital Output I/O Type on page 44).
- Click SAVE after setting the selected I/O type.
Defining and Testing Commands via Action Editor
Use action editor to create and test control commands via RS-232 control interfaces. You can create up to 5 commands.
To add an action:
- In the navigation pane, select Control Gateway. The Serial Ports tab opens.
2. Select the Action Editor tab. The Action Editor appears.

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Control gateway > Action Editor Serial Ports 1g IO >≡ Action Editor Command01 ACTION PROPERTIES Command01 Command01 Command Id 0 Command01 Custom Cmd 5 Command Name Command01 Port Command 02.03, 444 characters left Syntax (like CEC-SND command):Figure 38: Action Editor Tab
- Select a command name on the left side of the window.
- Change the command name, if required.
- Select the port (UART).
- Enter the appropriate command line (see example below) to have NET LED blink for 60 seconds:
For RS232 - 1,#IDV
- Click SAVE.
- Click RUN COMMAND to run the command test.
An action is entered and can be run.
Configuring Remote Buttons
Remotely operate, by I/O-connected remote buttons, configured control actions (see (see Defining and Testing Commands via Action Editor on page 47).
To Configure Remote Buttons:
- In the Navigation pane, click Control Gateway. The Serial Ports tab in the Device Settings page appears.
- Select the IO tab. The IO tab appears.
- Press to toggle Remote Button to On.
- Configure defined control actions, for button on/off states, using the State ON, State OFF drop-down boxes.
- Button default operation mode is latching. For momentary mode, check the Momentary checkbox.

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Serial Ports IO 1 IO 2 CAT-A IO 1 CAT-A IO 2 CAT-B IO 1 CAT-B IO 2 IO 1 PROPERTIES Remote Button Off State ON State OFF None None Momentary I/O Type Analog Input Digital Input Digital Output Maximum Reported Steps: 1Figure 39: I/O ports settings tab – Configuring Remote Buttons
5. Click SAVE.
A control actions remote button can now be remotely operated.
Diagnostics
Viewing Device Status
View the device status.
To view the device status:
- In the navigation pane, select Status.
- Select the Devices tab. The Devices Status appears.

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kramer SWT3-41-U-T Status > Devices Devices DEVICE STATUS Heat Normal 19° °C °F CHARGING TIME Host 1 00:00:00Figure 40: Device Status Page
- View device status.
Device status can be viewed.
Administration
Setting Security Properties
This section details the following actions:
• Changing Security Status on page 51.
• Defining 802.1X Authentication on page 52.
Changing Security Status
By default, security status is set to On.
Setting Security Status to Off
To set security status to Off:
- Go to the Security page (Figure 41).
- Select the Security tab. The Security settings appears.

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kramer SWT3-41-U-T Security > Security Security 802.1X SECURITY STATUS On Current Password ChangeFigure 41: Security – Security Tab
- Set SECURITY STATUS to Off. The Security Status window appears.

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Security Status Would you like to disable security? Enter password to disable the security.Figure 42: Security Status Message
- Enter the current password.
- Click OK.
Security status is set to Off.
Setting Security Status to On
To set security status to on:
- Go to the Security > Security (Figure 41).
- Set SECURITY STATUS to On.
Security status is set to On.
Changing Web Pages Access Password
To change the password for accessing the embedded web pages:
- Go to the Security page (Figure 22).
- Select the Security Tab. The Security settings appear (Figure 43).
- Enter the Current Password and click Change. The new password settings appear.

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SECURITY STATUS On Current Password ..... Change New Password Confirm Password CANCEL SAVEFigure 43: Device Settings – Changing the Password
- Enter the new password and confirmation password and click SAVE.
The password is changed.
Defining 802.1X Authentication
802.1x security standard supports IT networking authentication based on LAN port and MAC address.
To configure security:
- In the Navigation pane, click Security. The Security settings tab in the Security page appears.
- Select 802.1X tab. The 802.1X settings tab appears (see Figure 44).

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kramer SWT3-41-U-T Security > 802.1X Security 802.1X IEEE 802.1X AUTHENTICATION OffFigure 44: 802.1X Tab
- For 802.1x authentication, click ON to enable 802.1x authentication service. 802.1x supports authentication based on port and MAC address.
- When set to ON check one standard authentication method to set its security attributes.
■ PEAP-MSCHAP V2 (Figure 45) – Enter:
- Username - up to 24 alphanumeric characters, including “_” and “-” characters within the username, and
• Password - up to 24 ASCII characters

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kramer SWT3-41-U-T Security > 802.1X Security 802.1X IEEE 802.1X AUTHENTICATION On Authentication Method EAP-MSCHAP V2 Username password Password EAP-TLSFigure 46: Security Tab – EAP-MSCHAP V2 Authentication
- EAP-TLS (Figure 47) – To submit certificate from the server for authentication:
- Enter Username,
- Click 📋 to upload the certificates and keys,
- Enter the private key password (assigned by IT administrator),
■ Set Server Certificate On

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kramer SWT3-41-U-T Security > 802.1X Security 802.1X IEEE 802.1X AUTHENTICATION On Authentication Method ○ EAP-MSCHAP V2 ● EAP-TLS Username password Client Certificate Private Key Private Key PasswordFigure 48: EAP-TLS – Certificates and Password
5. Click APPLY.
802.1x authentication security is configured.
Viewing the About Page
View the firmware version and Kramer Electronics Ltd details in the About page.

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kramer SWT3-41-U-T About > General Info i General Info GENERAL INFO Web Version 1.0.1 Kramer Electronics Ltd. 2 Negev St. Airport City, 7019900, Israel Tel: +972-73-2650200 Email: info@kramerav.com Web: KramerAV.comFigure 49: About Page
Upgrading Firmware
Use the Kramer K-UPLOAD software to upgrade the firmware via ethernet or the RS-232 port, allowing RS-232 to control/program the device). The device continues to operate and once FW upload complete, you are asked to Restart no or later.
The latest version of K-UPLOAD and installation instructions can be downloaded from our website at: www.kramerav.com/support/product_downloads.asp.

Note that in order to use the micro USB port, you need to install the Kramer USB driver, available at: www.kramerav.com/support/product_downloads.asp.
Technical Specifications
SWT3-41-U-T
| Hosts | 2 USB 3.2 & PD 3.0 | On USB type-C female connectors | |
| 2 USB 3.2 | On USB-B female connectors | ||
| Devices | 3 USB 3.2 | On USB-A female connectors | |
| 1 USB 3.2 | On USB type-C female connector | ||
| Ports | 1 Stereo Analog Balanced Audio | On 5-pin terminal block for audio extension | |
| 2 CAT | On RJ-45 female connector for extension line | ||
| 1 PoE-accepting Ethernet | On an RJ-45 female connector for LAN connection and extension over CAT links | ||
| 1 RS-232 | On 3-pin terminal block | ||
| 2 GPIO | On 2-pin terminal block | ||
| USB Features | Integrated USB Hubs | 2 [device 1 & 2 ports] or 1 [other device ports] | |
| Standards Compliance | USB 3.2 GEN 2, 2.0 and 1.1 | ||
| Extended USB | Data Rate | Up to 480Mbps | |
| Transmitted Data Bandwidth | Up to 300Mbps | ||
| Standards Compliance | 2.0 and 1.1 USB | ||
| Controls | Front Panel | Input selector buttons, A+B CAT, Net and Status LED indicators. | |
| Extension Line | Reach | Up to 100m (330ft) when using Kramer cables | |
| Extended Ethernet | Data Rate | Up to 100Mbps | |
| Extended RS-232 | Baud Rate | 9600 | |
| Power | Included Power Adapteri For HW Rev 02 and higher, 20V PSU (power supply unit) is included (replacing the 12V PSU). | 20V DC: 6A | |
| Consumption: 3.8A | |||
| Max. Power: 80W | |||
| Optional Power Adapter | 12V DC: 2A | ||
| Consumption: 1.2A | |||
| Max. Power: 15W | |||
| PoE | Consumption | 370mA | |
| Max. Power | 20W | ||
| USB-C Host Charging | Max. Power | 60Wi When powered with 20V power supply only | |
| Compliance | PD 3.0 | ||
| USB Device Charging | Max. Total Current | 2A | |
| Environmental Conditions | Operating Temperature | 0° to +40°C (32° to 104°F) | |
| Storage Temperature | -40° to +70°C (-40° to 158°F) | ||
| Humidity | 10% to 90%, RHL non-condensing | ||
| Regulatory Compliance | Safety | CE, FCC, UKCA | |
| Environmental | RoHs, WEEE | ||
| Enclosure | Size | 0.5 1U rack | |
| Type | Aluminum | ||
| Cooling | Fan Ventilation | ||
| General | Net Dimensions (W, D, H) | 21.46cm x 16.3 cm x 4.36cm(8.45" x 6.4" x 1.7") | |
| Shipping Dimensions (W, D, H) | 35cm x 21cm x 6.8 cm(13.77" x 8.26" x 2.67") | ||
| Net Weight | 0.847 kg(0.84lbs) | ||
| Shipping Weight | 1.395 kg(3.075lbs) | ||
| Accessories | 20V DC: 6A power supply and cord, USB-C multi-signal cable | ||
| Specifications are subject to change without notice at www.kramerav.com | |||
EXT3-UE-R
| Ports | 1 CAT | On RJ-45 female connector for extension line | |
| 1 Stereo Analog Balanced Audio | On 5-pin terminal block for audio extension | ||
| 3 USB 2.0 Devices | On USB-A female connector | ||
| 1 USB 2.0 Devices | On a USB-C female connector | ||
| 1 PoE-accepting Ethernet | On RJ-45 female connector for LAN connection and extension over CAT link | ||
| 1 RS-232 | On 3-pin terminal block | ||
| 2 GPIO | On 2-pin terminal block | ||
| Extension Line | Reach | Up to 100m (330ft) when using Kramer cables | |
| Extended USB | Data Rate | Up to 480Mbps | |
| Integrated USB Hubs | 1 | ||
| Transmitted Data Bandwidth | Up to 300Mbps | ||
| Standards Compliance | 2.0 and 1.1 USB | ||
| Controls | Front Panel | Link and ON Status LED indicators. | |
| Extended Ethernet | Data Rate | Up to 100Mbps | |
| Extended RS-232 | Baud Rate | 9600 | |
| Power | Power adaptor | Source | 12V DC/2A (not included) |
| Consumption | 1.1A | ||
| Max. Power | 12W | ||
| PoC | Consumption | 0.15A | |
| Max. Power | 3W | ||
| USB Device Charging | Max. Total Current | 2AWhen device is PoC-powered via HDBT, total USB devices charging current is 0.5A only.Workaround: Power device via either LAN PoE or optional power supply to increase total charging current. | |
| Environmental Conditions | Operating Temperature | 0° to +40°C (32° to 104°F) | |
| Storage Temperature | -40° to +70°C (-40° to 158°F) | ||
| Humidity | 10% to 90%, RHL non-condensing | ||
| Regulatory Compliance | Safety | CE, FCC, UKCA | |
| Environmental | RoHs, WEEE | ||
| General | Size | Tool | |
| Type | Aluminum | ||
| Cooling | Passive | ||
| Net Dimensions (W, D, H) | 12.3cm x 6.95cm x 2.74cm(4.84" x 2.73" x 0.37") | ||
| Shipping Dimensions (W, D, H) | 15.7cm X 12cm X 8.7cm(6.18" x 4.72" x 3.42") | ||
| Net Weight | 0.242kg (0.53lbs) | ||
| Shipping Weight | 0.963kg (2.21lbs) | ||
| Accessories | None | ||
| Specifications are subject to change without notice at www.kramerav.com | |||
EXT3-U-R
| Ports | 1 CAT | On an RJ-45 female connector for extension line |
| 1 Stereo Analog Unbalanced Audio | On a 3.5mm mini jack for audio extension | |
| 4 USB | On USB-A female connector for USB devices extension | |
| 1 RS-232 | On a 3-pin terminal block for serial link extension | |
| Extended USB | Data Rate | Up to 480Mbps |
| Transmitted Data Bandwidth | Up to 300Mbps | |
| Standards Compliance | 1.1 and 2.0 USB | |
| Extension Line | Reach | CAT 6A: Up to 100m (330ft)CAT 5e: Up to 30m (100ft)When using Kramer cables |
| Extended RS-232 | Baud Rate | 9600 |
| USB Charging | Max Total Current | PSU-powered: 2.5APoC-powered: 0.5A |
| Max Current Per Port | PSU-powered: 2APoC-powered: 0.5A | |
| Indication LEDs | Front Panel | LINK LED and ON LED |
| Power | Consumption | 12V DC, 1500mA |
| Source | 12V DC, 2A | |
| Specifications are subject to change without notice at www.kramerav.com | ||
ACC3-12-SP
| Ports | 1 CAT | On RJ-45 female connector |
| 2 CAT | On RJ-45 female connector for extension line | |
| Environmental Conditions | Operating Temperature | 0° to +40°C (32° to 104°F) |
| Storage Temperature | -40° to +70°C (-40° to 158°F) | |
| Humidity | 10% to 90%, RHL non-condensing | |
| Regulatory Compliance | Safety | CE, FCC, UKCA |
| Environmental | RoHs, WEEE | |
| Enclosure | Size | Pico Tools |
| Type | Aluminum | |
| Cooling | None | |
| General | Net Dimensions (W, D, H) | 6.22cm x 5.18 cm x 2.44cm(8.45" x 6.4" x 1.7") |
| Shipping Dimensions (W, D, H) | 49cm x 18.6 cm x 58.8cm(19" x 7.32" x 23.14") | |
| Net Weight | 0.104(0.22lbs) | |
| Shipping Weight | 0.214 kg(0.47lbs) | |
| Accessories | None | |
| Specifications are subject to change without notice at www.kramerav.com | ||
Default Communication Parameters
RS-232
| Baud Rate: | 115,200 |
| Data Bits: | 8 |
| Stop Bits: | 1 |
| Parity: | None |
| Command Format: | ASCII |
| Example (Route video input 2 to the output): | #ROUTE_1,1,2 |
IP DHCP ON
| To reset the IP settings to the factory reset values go to: Menu->Setup -> Factory Reset-> press Enter to confirm | |
| Fallback IP Address: | 192.168.1.39 |
| Fallback Subnet mask: | 255.255.255.0 |
| Fallback gateway: | 192.168.0.1 |
| Default username: | Admin |
| Default password: | Admin |
Full Factory Reset
| P3K | “#FACTORY” command. After receiving "FACTORY OK" perform one of the following to restart the device and complete the procedure: Power cycle Send command "#RESET" |
| Embedded webpages | Go to: Device>General and click FACTORY RESET |
Protocol 3000
Kramer devices can be operated using Kramer Protocol 3000 commands sent via serial or Ethernet ports.
Understanding Protocol 3000
Protocol 3000 commands are a sequence of ASCII letters, structured according to the following.
- Command format:
| Prefix | Command Name | Constant (Space) | Parameter(s) | Suffix |
| # | Command | - | Parameter |
- Feedback format:
| Prefix | Device ID | Constant | Command Name | Parameter(s) | Suffix |
| ~ | nn | @ | Command | Parameter |
- Command parameters – Multiple parameters must be separated by a comma (,). In addition, multiple parameters can be grouped as a single parameter using brackets ([ and ]).
- Command chain separator character – Multiple commands can be chained in the same string. Each command is delimited by a pipe character (I).
- Parameters attributes – Parameters may contain multiple attributes. Attributes are indicated with pointy brackets (<...>) and must be separated by a period (.).
The command framing varies according to how you interface with SWT3-41-U-T. The following figure displays how the # command is framed using terminal communication software (such as Hercules):

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Hercules SETUP utility by HW-group.com UDP Setup | Seal | TCP Client | TCP Server | UDP | Test Mode | About | Received/Sart data Connecting to 192.168.110.54 ... Connected to 192.168.110.54 +01@ OK TCP Module IP Port 192.168.110.54 5000 Ping Disconnect TEA authorization TEA key 1: 01026304 3: 090A0B0C 2: 05000700 4: 0D0E0F10 Authorization code: PortStore test NVT disable Received test data Redirect to UDP Send ##(cr) HEX Send HEX Send HEX Send HEX Send HW group www.HBP-group.com Hercules SETUP utility Version 3.2.8Protocol 3000 Commands
| Function | Description | Syntax | Parameters/Attributes | Example |
| # | Protocol handshaking.1 Validates the Protocol 3000 connection and gets the machine number.Step-in master products use this command to identify the availability of a device. | COMMAND#FEEDBACK~nn@_ok<LF> | # | |
| AUD-MUTE | Set audio mute. | COMMAND#AUD-MUTE_out_index,mute_modeFEEDBACK~nn@AUD-MUTE_out_index,mute_mode<CR> | out_index -1mute_mode - On/Off0 - Off1 - On | Set Output 1 to mute:#AUD-MUTE_1,1 |
| AUD-MUTE? | Set audio mute. | COMMAND#AUD-MUTE_out_indexFEEDBACK~nn@AUD-MUTE_out_index,mute_mode<CR> | out_index -1mute_mode - On/Off0 - Off1 - On | Get Output 1 to mute:#AUD-MUTE_1,1 |
| AUTH-802-1X- ENABLE | Set authentication 802.1X feature for the specific interface. | COMMAND#AUTH-802-1X-ENABLE_interface,enable_statusFEEDBACK~nn@AUTH-802-1X- ENABLE_interface,enable_status<CR> | interface - Interface ID - 0 enable_status -0 - Off1 - On | Set the authentication 802.1X feature on:#AUTH-802-1X- ENABLE_0,1 |
| AUTH-802-1X- ENABLE? | Get authentication 802.1X feature for the specific interface. | COMMAND#AUTH-802-1X-ENABLE?_interfaceFEEDBACK~nn@AUTH-802-1X- ENABLE_interface,enable_status<CR> | interface - Interface ID - 0 enable_status -0 - Off1 - On | Get the authentication 802.1X feature status:#AUTH-802-1X- ENABLE?_0 |
| AUTH-802-1X- ENABLE? | Get Authentication 802.1X operational status. | COMMAND#AUTH-802-1X-OP-STAT?_interfaceFEEDBACK~nn@AUTH-802-1X-OP-STAT_interface,status | interface -Index for ethernet interface number. - 0 enable_status -0 - Running1 - Not Running | Get the authentication 802.1X operational status:#AUTH-802-1X-OP-STAT?_0 |
| AUTH-802-1X- OP-STAT? | Get Authentication 802.1X operational status. | COMMAND#AUTH-802-1X-OP-STAT?_interfaceFEEDBACK~nn@AUTH-802-1X-OP-STAT_interface | interface - Interface ID - 0 enable_status -0 - Running1 - Not Running | Get the authentication 802.1X operational status:#AUTH-802-1X-OP-STAT?_0 |
| AV-SW-MODE | Set input auto switch mode (per output). | COMMAND#AV-SW-MODE_layer_type,out_index,connection_modeFEEDBACK~nn@AV-SW-MODE_layer_type,out_index,connection_mode<CR> | layer_type - Number that indicates the signal type:1 - Video2 - Audioout_index - 1connection_mode - Connection mode0 - manual1 - priority switch2 - last connected switch | Set the input audio switch mode to Manual for HDMI OUT:#AV-SW-MODE_1,1,0 |
| AV-SW-MODE? | Get input auto switch mode (per output). | COMMAND#AV-SW-MODE_layer_type,out_indexFEEDBACK~nn@AV-SW-MODE_layer_type,out_index,connection_mode<CR> | layer_type - Number that indicates the signal type:1 - Video2 - Audioout_index - 1connection_mode - Connection mode0 - manual1 - priority switch2 - last connected switch | Get the input audio switch mode for HDMI OUT:#AV-SW-MODE_1,1 |
| BEACON-INFO? | Get beacon information, including IP address, UDP control port, TCP control port, MAC address, model, name. | COMMAND#BEACON-INFO?FEEDBACK~nn@BEACON-INFO_port_id,ip_string,udp_port,tcp_port,mac_address, model,na#<LR> | port_id - ID of the Ethernet port ip_string - Dot-separated representation of the IP address udp_port - UDP control port tcp_port - TCP control port mac_address - Dash-separated mac address model - Device model name - Device name | Get beacon information:#BEACON-INFO? |
| BUILD-DATE? | Get device build date. | COMMAND#BUILD-DATE?FEEDBACK~nn@BUILD-DATE_date,time<LR> | date - Format: YYYY/MM/DD where YYYY = YearMM = MonthDD = Daytime - Format: hh:mm:ss wherehh = hoursmm = minutesss = seconds | Get the device build date:#BUILD-DATE? |
| CAT-LINK-DUAL? | Gets Dual Link Mode status | COMMAND#CAT-LINK-DUAL?_port_idFEEDBACK~nn@CAT-LINK-DUAL?_port_id,status | port_id - CAT port to check if dual link is activated.1 - CAT port A2 - CAT port Bstatus -0 - disable (not activated)1 - enable (activated) | Get the Dual Link Mode status:#CAT-LINK-DUAL_1port_id: 1 (currently, the only available port) |
| CONF-EXPORT | Export configuration file | COMMAND#CONF-EXPORT,FEEDBACK~nn@CONF-EXPORT_file_name | Export configuration file:#CONF-EXPORT_ | |
| CONF-IMPORT | Export configuration file | COMMAND#CONF-IMPORT_file_nameFEEDBACK~nn@CONF-IMPORT_file_name | file_name - the name of the file we want to upload for the import. | Import configuration file:#CONF-IMPORT_8N73-41-U-1-conf |
| COM-ROUTE? | Get tunneling port routing.1 This command sets tunneling port routing. Every com port can send or receive data from the ETH port.Set command can edit an existing configuration. | COMMAND#COM-ROUTE?_com_idFEEDBACK~nn@COM-ROUTE_00_id,port_type,port_id,eth_rep_en,ping_val | com_id - Machine dependent, *(get all route tunnels)port_type - TCP/UDP0 - TCP1 - UDPport_id - TCP/UDP port numbereth_rep_en - Ethernet Reply0 - COM port does not send replies to new clients1 - COM port sends replies to new clients.ping_val - Send an empty string to TCP client every 0 to 3600 seconds. 0 - 3600 | Get tunneling port routing for all route tunnels:#COM-ROUTE?_ |
| COUNTER? | Get the sent or received CEC messages count. | COMMAND#COUNTER?_category_id,sub_category_idFEEDBACK~nn@COUNTER_category_id,sub_category_id,count | category_id - CEC messages: 0Sub_category_id - Type of message:0 - Sent message1 - Received messagecount - Number range: 0-65535 | Get the number of sent messages:#COUNTER?_0,0 |
| COUNTER-CLR | Clear CEC messages. | COMMAND#COUNTER-CLR?_category_id,sub_category_clrFEEDBACK~nn@COUNTER-CLR_category_id,sub_category_id,count | category_id - CEC messages: 0Sub_category_clr - Type of message to clear:0 - Clear sent messages1 - Clear received messages* - Clear all CEC messages | Clear all CEC messages:#COUNTER-CLR?_0, ' |
| DEV-STATE? | Get the device state. | COMMAND#DEV-STATE?FEEDBACK~nn@DEV-STATE_dev_state' | dev_state - device state0 - Active1 - Power-on and no connected AV I/O ports (detecting cable connection faults)2 - Power-on and standby (low power; cables are either connected or not) | Get device status:#DEV-STATE?_ |
| ETH-PORT | Set Ethernet port protocol.1 If the port number you enter is already in use, an error is returned.The port number must be within the following range: 0-(2^16-1). | COMMAND#ETH-PORT_port_type,port_idFEEDBACK~nn@ETH-PORT_port_type,port_id | port_type - TCP/UDPort_id - TCP/UDP port number(0 - 65535) | Set the Ethernet port protocol for TCP to 12457:#ETH-PORT_TCP,12457 |
| ETH-PORT? | Get Ethernet port protocol.1 If the port number you enter is already in use, an error is returned.The port number must be within the following range: 0-(2^16-1). | COMMAND#ETH-PORT_port_typeFEEDBACK~nn@ETH-PORT_port_type,port_id | port_type - TCP/UDPort_id - TCP/UDP port number(0 - 65535) | Get the Ethernet port protocol for UDP:#ETH-PORT?_UDP |
| ETH-TUNNEL? | Get an open tunnel parameters. | COMMAND#ETH-TUNNEL?_tunnel_idFEEDBACK~nn@ETH-TUNNEL_tunnel_id,cmd_name,port_type,port_id,eth_ip,remote_port_id,cth_rep_en,connection_type | tunnel_id - Tunnel ID number, *(gel all open tunnels)cmd_name - UART numberport_type - TCP/UDP0 - TCP1 - UDPort_id - TCP/UDP port numbereth_ip - Client IP addressremote_port_id - Remote port numbereth_rep_en - Ethernet Reply0 - COM port does not send replies to new clients1 - COM port sends replies to new clientsconnection_type - Connection type0 - not wired connection1 - wired connection | Set baud rate to 9600, 8 data bits, parity to none and stop bit to 1:#ETH-TUNNEL?_* |
| FACTORY | Reset device to factory default configuration.1 This command deletes all user data from the device. The deletion can take some time.Your device may require powering off and powering on for the changes to take effect. | COMMAND#FACTORYFEEDBACK~nn@FACTORY_0x | Reset the device to factory default configuration:#FACTORY | |
| FW-TYPE? | Get the current FW type status.Used by Kramer Network and KUpload to identify recovery process. | COMMAND#FW-TYPE?_FEEDBACK~nn@FEATURE-LIST_fw_type | Fw_type-0-Application1-Safe mode (kboot) | Get the current FW type status:#FW-TYPE?_ |
| GLOBAL-GW-ACTIVE | Set global gateway to active / inactive. | COMMAND#GLOBAL-GW-ACTIVE_statusFEEDBACK~nn@GLOBAL-GW-ACTIVE_status | status-On/OffON-ActiveOff-Inactive | Set global gateway off:#AUDIO-BYPASS_OPF |
| GLOBAL-GW-ACTIVE? | Set global gateway to active / inactive. | COMMAND#GLOBAL-GW-ACTIVE?FEEDBACK~nn@GLOBAL-GW-ACTIVE_status | status-On/OffON-ActiveOff-Inactive | Get global gateway off:#AUDIO-BYPASS? |
| GPIO-CFG | Set HW GPIO configuration. | COMMAND#GPIO-CFG_gpio_id,gpio_type,gpio_dir,pull-upFEEDBACK~nn@GPIO-CFG_gpio_id,gpio_type,gpio_dir | gpio_id-Hardware GPIO number (1-2)gpio_type-Hardware GPIO type0-analog1-digitalgpio_dir-Hardware GPIO direction0-input1-outputpullup-Enable/Disable pull-up0-disable1-enable | Set HW GPIO 1 configuration:#GPIO-CFG_1,1,1,1 |
| GPIO-CFG? | Get HW GPIO configuration. | COMMAND#GPIO-CFG?_gpio_idFEEDBACK~nn@GPIO-CFG_gpio_id,gpio_type,gpio_dir | gpio_id-Hardware GPIO number (1-2)gpio_type-Hardware GPIO type0-analog1-digitalgpio_dir-Hardware GPIO direction0-input1-outputpullup-Enable/Disable pull-up0-disable1-enable | Get HW GPIO configuration:#GPIO-CFG?_1 |
| GPIO-STATE | Set HW GPIO state.1 GPIO-STATE? can only be set in digital out mode and the answer is 0=Low,1=High. In all other modes an error message is sent.The device uses this command to notify the user of any change regarding the step and voltage in:In digital mode the answer is 0 (low), 1 (high).In analog mode the answer is 0 to 100. | COMMAND#GPIO-STATE_gpio_id,gpio_modeFEEDBACK~nn@GPIO-STATE_gpio_id,gpio_mode | gpio_id-Hardware GPIO number (1-2)gpio_mode-Hardware GPIO state0-Low1-High | Set GPIO 2 to High:#GPIO-STATE_2,1 |
| GPIO-STATE? | Get HW GPIO state.1 GPIO-STATE? can only be set in digital out mode and the answer is 0=Low,1=High. In all other modes an error message is sent.The device uses this command to notify the user of any change regarding the step and voltage in:In digital mode the answer is 0 (low), 1 (high).In analog mode the answer is 0 to 100. | COMMAND#GPIO-STATE?_gpio_idFEEDBACK~nn@GPIO-STATE_gpio_id,gpio_mode | gpio_id-Hardware GPIO number (1-2)gpio_mode-Hardware GPIO state0-Low1-High | Get GPIO 2 state:#GPIO-STATE?_2 |
| GPIO-STEP | Set HW GPIO step.1 In digital mode the response is 2.In analog mode the response is 1 to 100.In other modes an error is returned. | COMMAND#GPIO-STEP_gpio_id,step_idFEEDBACK~nn@GPIO-STEP_gpio_id,step_id,currentstep | gpio_id-HW GPIO number (1-2)step_id-The configuration step -See note in description.currentstep-The actual step depending on the measured voltage | Set GPIO 2 (set to Analog In) configuration step to 38mV:#GPIO-STEP_2,38 |
| GPIO-STEP? | Get HW GPIO step.1 In digital mode the response is 2.In analog mode the response is 1 to 100.In other modes an error is returned. | COMMAND#GPIO-STEP?_gpio_idFEEDBACK~nn@GPIO-STEP_gpio_id,step_id,current-stepLF> | gpio_id-HW GPIO number (1-2)step_id-The configuration step - See note in description.currentstep-The actual step depending on the measured voltage | Get GPIO 2configuration:#GPIO-STEP?_2 |
| GPIO-THR | Set HW GPIO voltage levels. | COMMAND#GPIO-THR_gpio_id,low_level,high_level.FEEDBACK~nn@GPIO-THR_gpio_id,low_level,high_levelLF> | gpio_id-Hardware GPIO number (1-2)low_level-Voltage 500 to 28000 millivoltshigh_level-Voltage 2000 to 30000 millivolts | Set GPIO 2 to a low level of 800mV and a high level of 2200mV:#GPIO-THR_2,800,2200 |
| GPIO-THR? | Get HW GPIO voltage levels that were set. | COMMAND#GPIO-THR?_gpio_idFEEDBACK~nn@GPIO-THR_gpio_id,low_level,high_levelLF> | gpio_id-Hardware GPIO number (1-2)low_level-Voltage 500 to 28000 millivoltshigh_level-Voltage 2000 to 30000 millivolts | Get GPIO 2:#GPIO-THR?_2 |
| GPIO-VOLT? | Get active voltage levels of HW GPIO.1 This command is not available in digital out mode. | COMMANDGPIO-VOLT?_gpio_idFEEDBACK~nn@GPIO-VOLT_gpio_id,voltageLF> | gpio_id-Hardware GPIO number (1-2)voltage-Voltage 0 to 30000 millivolts | Get GPIO 1 voltage:#GPIO-VOLT?_1 |
| HDCP-OUT | Set HDCP mode.1 Get HDCP working mode on the device input:HDCP supported-HDCP ON [default].HDCP not supported-HDCP OFF.HDCP support changes following detected sink-MIRROR OUTPUT. | COMMAND#HDCP-OUT_out_index,modeFEEDBACK~nn@HDCP-OUT_out_index,modeLF> | out_index-Number that indicates the specific input:1-HDBaset OUTmode-HDCP mode:0-Follow Input1-HDCP always ON (i.e. output signal is always HDCP-encrypted, regardless of input HDCP) | Set the output HDCP mode of HDBaseT OUT to follow input:#HDCP-OUT_1,0 |
| HDCP-OUT? | Get HDCP mode.1 Get HDCP working mode on the device input:HDCP supported-HDCP ON [default].HDCP not supported-HDCP OFF.HDCP support changes following detected sink-MIRROR OUTPUT. | COMMAND#HDCP-OUT_out_indexFEEDBACK~nn@HDCP-OUT_out_index,modeLF> | out_index-Number that indicates the specific input:1-HDBaset OUTmode-HDCP mode:0-Follow Input1-HDCP always ON (i.e. output signal is always HDCP-encrypted, regardless of input HDCP) | Get the output HDCP-MODE of HDBaseT OUT:#HDCP-OUT?_1 |
| HELP | Get command list or help for specific command. | COMMAND#HELP#HELP_cmd_nameFEEDBACK1.Multi-line:~nn@Device_cmd_name,.cmd_name..To get help for command use: HELP (COMMAND_NAME)..LF~nn@HELP_cno_name::LRFdescription..LFUSAGE:usage | cmd_name-Name of a specific command | Get the command list:#HELPTo get help for AV-SW-TIMEOUT:HELP,.av-sw-timeoutCR> |
| IDV | Set visual indication from device.1 Using this command, some devices can light a sequence of buttons or LEDs to allow identification of a specific device from similar devices. | COMMAND#IDVFEEDBACK~nn@IDV_ck | last_event-the number of last events to view | #IDV |
| LOG-TAIL? | Get the list of the N last events. | COMMAND#LOG-TAIL?_last_eventFEEDBACK~nn@LOG-TAIL_last_event,ok, | last_event-the number of last events to view | Get the protocol permission level to Admin:#LOG-TAIL?_k |
| LOGIN | Set protocol permission.1 The permission system works only if security is enabled with the "SECUR" command.LOGIN allows the user to run commands with an End User or Administrator permission level.When the permission system is enabled, LOGIN enables running commands with the User or Administrator permission levelWhen set, login must be performed upon each connectionIt is not mandatory to enable the permission system in order to use the deviceIn each device, some connections allow logging in to different levels. Some do not work with security at all.Connection may logout after timeout. | COMMAND#LOGIN_login_level,passwordFEEDBACK~nn@LOGIN_login_level,password_0or~nn@LOGIN_err_304(LF)(if bad password entered) | login_level – Level of permissions required (User or Admin)password – Predefined password (by PASS command). Default password is an empty string | Set the protocol permission level to Admin (when the password defined in the PASS command is 33333): #LOGIN_admin,33333 |
| LOGIN? | Get protocol permission state.1 The permission system works only if security is enabled with the "SECUR" command.LOGIN allows the user to run commands with an End User or Administrator permission level.When the permission system is enabled, LOGIN enables running commands with the User or Administrator permission levelWhen set, login must be performed upon each connectionIt is not mandatory to enable the permission system in order to use the deviceIn each device, some connections allow logging in to different levels. Some do not work with security at allConnection may logout after timeout. | COMMAND#LOGIN_login_levelFEEDBACK~nn@LOGIN_login_level,password_0or~nn@LOGIN_err_304(LF)(if bad password entered) | login_level – Level of permissions required (User or Admin)password – Predefined password (by PASS command). Default password is an empty string or NO SECURE if authentication is removed. | Get the protocol permission level to Admin: #LOGIN_,admin |
| LOGOUT | Cancel current permission level.1 Logs out from End User or Administrator permission levels to Not Secure. | COMMAND#LOGOUTFEEDBACK~nn@LOGOUT_0(LF) | #LOGOUT | |
| MODEL? | Get device model. | COMMAND#MODEL?FEEDBACK~nn@MODEL_node_name(LF) | model_name – String of up to 19 printable ASCII chars | Get the device model: #MODEL? |
| NAME | Set machine (DNS) name.1 The machine name is not the same as the model name. The machine name is used to identify a specific machine or a network in use (with DNS feature on). | COMMAND#NAME_machine_nameFEEDBACK~nn@NAME_machine_name(LF) | machine_name – String of up to 15 alpha-numeric chars (can include hyphen, not at the beginning or end) | Set the DNS name of the device to room-442: #NAME_room-442 |
| NAME? | Get machine (DNS) name.1 The machine name is not the same as the model name. The machine name is used to identify a specific machine or a network in use (with DNS feature on). | COMMAND#NAME?_FEEDBACK~nn@NAME_machine_name | machine_name – String of up to 15 alpha-numeric chars (can include hyphen, not at the beginning or end) | Got the DNS name of the device:#NAME?_ |
| NAME-RST | Reset machine (DNS) name to factory default.1 Factory default of machine (DNS) name is 'KRAMER_' + 4 last digits of device serial number. | COMMAND#NAME-RSTFEEDBACK~nn@NAME-RST_ok | Reset the machine name (S/N last digits are 0102):#NAME-RST_rumer_0102 | |
| NET-CONFIG | Set a network configuration.1 Parameters [DNS1] and [DNS2] are optional.1 For Backward compatibility, the id parameter can be omitted. In this case, the Network ID, by default, is 0, which is the Ethernet control port.1 If the gateway address is not compliant to the subnet mask used for the host IP, the command will return an error. Subnet and gateway compliancy specified by RFC950. | COMMAND#NET-CONFIG_netw_id,net_ip,net_mask,gateway,[cnal],[dns2]FEEDBACK~nn@NET-CONFIG_netw_id,net_ip,net_mask,gateway | netw_id - 0net_ip - Network IPnet_mask - Network maskgateway - Network gateway | Set the device network parameters to IP address 192.168.113.10, net mask 255.255.0.0, and gateway 192.168.0.1:#NET-CONFIG_0,192.168.113.10,255.255.0.0,132.168.0.1 |
| NET-CONFIG? | Get a network configuration.1 Parameters [DNS1] and [DNS2] are optional.1 For Backward compatibility, the id parameter can be omitted. In this case, the Network ID, by default, is 0, which is the Ethernet control port.1 If the gateway address is not compliant to the subnet mask used for the host IP, the command will return an error. Subnet and gateway compliancy specified by RFC950. | COMMAND#NET-CONFIG_netx_id,net_ip,net_mask,gateway, [dns1], [dns2]FEEDBACK~nn@NET-CONFIG_netx_id,net_ip,net_mask,gateway | netw_id - 0net_ip - Network IPnet_mask - Network maskgateway - Network gateway | Get the device network parameters:#NET-CONFIG?_ |
| NET-DHCP? | Get DHCP mode.1 For Backward compatibility, the id parameter can be omitted. In this case, the Network ID, by default, is 0, which is the Ethernet control port. | COMMAND#NET-DHCP?_netw_idFEEDBACK~nn@NET-DHCP_netx_id,dhcp_state | netw_id - Network ID-the device network interface (if there are more than one). Counting is 0 based, meaning the control port is '0', additional ports are 1,2,3,...dhcp_state-0 - Do not use DHCP. Use the IP set by the factory or using the net-ip or net-config command.1 - Try to use DHCP. If unavailable, use the IP set by the factory or using the net-ip or net-config command. | Get DHCP mode for port 1:#NET-DHCP?_ |
| NET-GATE | Set gateway IP.1 A network gateway connects the device via another network and maybe over the Internet. Be careful of security issues. For proper settings consult your network administrator. | COMMAND#NET-GATE_ip_addressesFEEDBACK~nn@NET-GATE_ip_addresses | ip_address - Format: xxx.xxx.xxx.xxx | Set the gateway IP address to 192.168.0.1:#NET-GATE_192.168.000.001 |
| NET-GATE? | Get gateway IP.1 A network gateway connects the device via another network and maybe over the Internet. Be aware of security problems. | COMMAND#NET-GATE_FEEDBACK~nn@NET-GATE_ip_addresses | ip_address - Format: xxx.xxx.xxx.xxx | Got the gateway IP address:#NET-GATE?_ |
| NET-IP | Set IP address.1 For proper settings consult your network administrator. | COMMAND#NET-IP_ip_addressFEEDBACK~nn@NET-IP_ip_address | ip_address - Format: xxx.xxx.xxx.xxx | Set the IP address to 192.168.1.39:#NET-IP_192.168.001.035 |
| NET-IP? | Get IP address. | COMMAND#NET-IP?_FEEDBACK~nn@NET-IP_ip_address | ip_address - Format: xxx.xxx.xxx.xxx | Get the IP address:#NET-IP?_ |
| NET-MAC? | Get MAC address.1 For backward compatibility, the id parameter can be omitted. In this case, the Network ID, by default, is 0, which is the Ethernet control port. | COMMAND#NET-MAC?idFEEDBACK~nn@NET-MAC_id,mac_address | id - Network ID-the device network interface (if there are more than one). Counting is 0 based, meaning the control port is '0', additional ports are 1,2,3,...mac_address - Unique MAC address. Format: XX-XX-XX-XX-XX where X is hex digit | #NET-MAC?id |
| NET-MASK | Set subnet mask.1 For proper settings consult your network administrator. | COMMAND#NET-MASK_net_maskFEEDBACK~nn@NET-MASK_net_mask | net_mask - Format: xxx.xxx.xxx.xxx | Set the subnet mask to 255.255.0.0:#NET-MASK_255.255.000.000 |
| NET-MASK? | Get subnet mask. | COMMAND#NET-MASK?_FEEDBACK~nn@NET-MASK_net_mask | net_mask - Format: xxx.xxx.xxx.xxx | Get the subnet mask:#NET-MASK? |
| PASS | Set password for login level.1 The default password is an empty string. | COMMAND#PASS_login_level,passwordFEEDBACK~nn@PASS_login_level,password | login_level - Level of login to set (End User or Administrator).password - Password for the login_level. Up to 15 printable ASCII chars | Set the password for the Admin protocol permission level to 33333:#PASS_admin_33333 |
| PASS? | Get password for login level.1 The default password is an empty string. | COMMAND#PASS_login_levelFEEDBACK~nn@PASS_login_level,password | login_level - Level of login to set (End User or Administrator).password - Password for the login_level. Up to 15 printable ASCII chars | Get the password for the Admin protocol permission:#PASS?_admin |
| PRG-ACTION | Add new user command.1 Programs matrix action as a response for external event (programmable button pressed). | COMMAND#PRG-ACTION_commandNum, type,name,commandFEEDBACK~nn@PRG-ACTION_commandNum, type,name,command | commandNum - Command number 0 to 4type - External programmable button cecname - Bitmap representing command - External programmable button ID | Add a new user command:#PRG-ACTION_1,3,1,0 |
| PRG-ACTION? | Add new user command.1 Programs matrix action as a response for external event (programmable button pressed). | COMMAND#PRG-ACTION?_commandNumFEEDBACK~nn@PRG-ACTION_commandNum, type,name,command | commandNum - Command number 0 - Input1 - Outputtype - External programmable button IDname - Bitmap representing command - External programmable button ID | Add a new user command:#PRG-ACTION_0,3,1,0 |
| PRG-BTN-ACTION | Set program button mode | COMMAND#FROG-BTN-MOD_btnNum,node,actionOn,actionOff,borBehaviorFEEDBACK~nn@PROG-BTN-MOD_btnNum,node,actionOn,actionOff,borBehavior | btnNum - Button number 0 to 41 and 2 are enabled when remote button is (node) On1 - IO 1 button2 - IO 2 button3 - Display On buttonmode - Remote button state0 - Off1 - OnactionOn -100 - None101 - Switch Input102 - Display On (via CEC)103 - Display Off (via CEC)104 - Mule105 - Unmute106 - Volume ++107 - Volume --0 - Command_011 - Command_022 - Command_033 - Command_044 - Custom 5actionOff - Button_mode100 - None101 - Switch Input102 - Display On (via CEC)103 - Display Off (via CEC)104 - Mute105 - Unmute106 - Volume ++107 - Volume --0 - Command_011 - Command_022 - Command_033 - Command_044 - Custom 5btnBehavior - Button_mode0 - Momentary mode disabled1 - Momentary mode enabled | Set the DISPLAY ON button to mule/unmute with the press of a button:#PROG-BTN-MOD_3,1,104,105,3 |
| PROG-BTN-MOD? | Get programmable buttons mode | COMMAND#FROG-BTN-MOD?FEEDBACK~nn@PROG-BTN-MOD_button_mode<CR><LF> | btnNum - Button number 0 to 41 and 2 are enabled when remote button is (node) On1 - IO 1 button2 - IO 2 button3 - Display On buttonmode - Remote button state0 - Off1 - OnactionOn -100 - None101 - Switch Input102 - Display On (via CEC)103 - Display Off (via CEC)104 - Mule105 - Umute106 - Volume ++107 - Volume --0 - Command_011 - Command_022 - Command_033 - Command_044 - Custom 5actionOff - Button_mode100 - None101 - Switch Input102 - Display On (via CEC)103 - Display Off (via CEC)104 - Mute105 - Unmute106 - Volume ++106 - Volume --0 - Command_011 - Command_022 - Command_033 - Command_044 - Custom 5btnBehavior - Button_mode0 - Momentary mode disabled1 - Momentary mode enabled | Get the mode of button 3:#PROG-BTN-MOD?_3 |
| PRIORITY | Set input priority. | COMMAND#PRIORITY_layer_type,priority_1,priority_2,priority_3FEEDBACK~nn@PRIORITY_layer_type,priority_1,priority_2,priority_3 | layer_type - Layer Enumeration1 - Videopriority - Priority of inputs (1-2)1 - USB-C 12 - HDMI 23 - HDMI 3 | Set the priority to first HDMI 2, USB-C 1 second and HDMI 3 third:#PRIORITY_1,2,1,3 |
| Function | Description | Syntax | Parameters/Attributes | Example | |
| PRIORITY? | Set input priority. | COMMAND#PRIORITY?_layer_typeFEEDBACK~nn@PRIORITY_ayer_type,priority_3,priority_2,priority_1,>= | layer_type - Layer Enumeration1 - Videopriority - Priority of inputs (1-2)1 - USB-C 12 - HDMI 23 - HDMI 3 | Get the input priority:#PRIORITY?_1 | |
| PROT-VER? | Get device protocol version. | COMMAND#PROT-VER?_FEEDBACK~nn@PROT-VER_3000:version | version - XX.XX where X is a decimal digit | Get the device protocol version:#PROT-VER?_ | |
| RESET | Reset device.1 To avoid locking the port due to a USB bug in Windows, disconnect USB connections immediately after running this command. If the port was locked, disconnect, and reconnect the cable to reopen the port. | COMMAND#RESETFEEDBACK~nn@RESET_ck | Reset the device:#RESET | ||
| ROUTE | Set layer routing.1 This command replaces all other routing commands. | COMMAND#ROUTE_ayer_type,out_index,in_indexFEEDBACK~nn@ROUTE_layer_type,out_index,in_index | layer_type Layer Enumeration1 - Video5 - USBout_index1 - Outputin_index -Source id for Video:1 - USB-C 12 - HDMI IN 23 - HDMI IN 3 | Route video input 2 to the output:#ROUTE_1,1,2 | |
| ROUTE? | Get layer routing state.1 This command replaces all other routing commands. | COMMAND#ROUTE?_layer_type,out_indexFEEDBACK~nn@ROUTE_layer_type,out_index,in_index | layer_type Layer Enumeration1 - Video5 - USBout_index1 - Outputin_index -Source id for Video:1 - USB-C 12 - HDMI IN 23 - HDMI IN 3 | Get video routing output:#ROUTE?_1,1 | |
| SECUR | Start/stop security.1 The permission system works only if security is enabled with the "SECUR" command. | COMMAND#SECUR_security_stateFEEDBACK~nn@SECUR_security_state | security_state - Security state0 - OFF (disables security)1 - ON (enables security) | Enable the permission system:#SECUR_1 | |
| SECUR? | Get security state.1 The permission system works only if security is enabled with the "SECUR" command. | COMMAND#SECUR?_security_stateFEEDBACK~nn@SECUR_security_state | security_state - Security state0 - OFF (disables security)1 - ON (enables security) | Enable the permission system:#SECUR?_ | |
| SIGNAL-USB-HOST? | Get if there is an active host connected to the port. | COMMAND!SIGNAL-USB-HOST??host_indexFEEDBACK~nn@SIGNAL-USB-HOST??host_index,state | host_index: the number of the host port1-Nstate: Active/Inactive0 - Active1 - Inactive | Get if there is active host connected to port 2:#SIGNAL-USB-HOST?_2 | |
| SN? | Get device serial number. | COMMAND#SN?FEEDBACK~nn@SN_serial_num | serial_num - 14 decimal digits, factory assigned | Get the device serial number:#SN? | |
| TIME | Set device time and date.1 The year must be 4 digits.The device does not validate the day of week from the date.Time format - 24 hours.Date format - Day, Month, Year. | COMMAND#TIME_day_of_week,date,dataFEEDBACK~nn@TIME_day_of_week,date,data | day_of_week - One of {SUN,MON,TUE,WED,THU,FRI,SAT}date - Format: DD-MM-YYYY.data - Format: hh:mm:ss wherehh = hoursmm = minutesss = seconds | Set device time and date to December 5, 2020 at 2:30pm:#TIME_mon_05-12-2020,14:30:00 | |
| TIME? | Get device time and date.1 The year must be 4 digits.The device does not validate the day of week from the date.Time format - 24 hours.Date format - Day, Month, Year. | COMMAND#TIME?FEEDBACK~nn@TIME_day_of_week,date,data | day_of_week - One of {SUN,MON,TUE,WED,THU,FRI,SAT}date - Format: YYYY/MM/DD whereYYYY = YearMM = MonthDD = Daydata - Format: hh:mm:ss wherehh = hoursmm = minutesss = seconds | Get device lime and date:#TIME? |
| Function | Description | Syntax | Parameters/Attributes | Example |
| TIME-LOC | Set local time offset from UTC/GMT.1 If the time server is configured, device time calculates by adding UTC_off to UTC time (that it got from the time server) + 1 hour if daylight savings time is in effect.TIME command sets the device time without considering these settings. | COMMAND#TIME-LOC_utc_off,dst_stateFEEDBACK~nn@TIME-LOC_utc_off,dst_stateLF> | utc_off - Offset of device time from UTC/GMT (without daylight time correction)dst_state - Daylight saving time state0 - no daylight saving time1 - daylight saving time | Set local time offset to 3 with no daylight-saving time:#TIME-LOC_3,0 |
| TIME-LOC? | Get local time offset from UTC/GMT.1 If the time server is configured, device time calculates by adding UTC_off to UTC time (that it got from the time server) + 1 hour if daylight savings time is in effect.TIME command sets the device time without considering these settings. | COMMAND#TIME-LOC?_FEEDBACK~nn@TIME-LOC_utc_off,dst_stateLF> | utc_off - Offset of device time from UTC/GMT (without daylight time correction)dst_state - Daylight saving time state0 - no daylight saving time1 - daylight saving time | Get local time offset from UTC/GMT:#TIME-LOC? |
| TIME-SRV | Set time server.1 This command is needed for setting UDP timeout for the current client list. | COMMAND#TIME-SRV_mode,time_server_ip,sync_hourFEEDBACK~nn@TIME-SRV_node,time_server_ip,sync_hour,server_statusLF> | mode - On/Off0 - Off1 - Ontime_server_ip - Time server IP addresssync_hour - Hour in day for time server syncserver_status - On/Off | Set time server with IP address of 128.138.140.44 to ON:#TIME-SRV_,128.138.140.44,0,1 |
| TIME-SRV? | Get time server.1 This command is needed for setting UDP timeout for the current client list. | COMMAND#TIME-SRV?_FEEDBACK~nn@TIME-SRV_node,time_server_ip,sync_hour,server_statusLF> | mode - On/Off0 - Off1 - Ontime_server_ip - Time server IP addresssync_hour - Hour in day for time server syncserver_status - On/Off | Get time server:#TIME-SRV? |
| UART-CAT-LINK? | Get the CAT port that has been chosen to be linked to the local serial port (Transmitter). | COMMAND#UART-CAT-LINK_UART_idFEEDBACK~nn@UART-CAT-LINK_UART_id_valens_port_idLF> | UART_id - local UART we want to use for id:1 (= UART0)valens_port_id: the CAT port we want to connect to1 = UART1 connected to A/A+B CAT port.2 = UART2 connected to B CAT port. | Get the selection of CAT port that connected to local UART0#UART-CAT-LINK? |
| UART-CAT-LINK | Set the CAT port that has been chosen.Setting the chosen CAT port to communicate with when in Extension mode.In Extension mode we are connecting the local UART and the CAT UART to make both sides communicate.(The data is passing through the HDBT to the RS232 in the remote receiver). | COMMAND#UART-CAT-LINK_UART_id,CAT_port_idFEEDBACK~nn@USBA-DISCONNECT-MODE_modeLF> | UART_id - local UART we want to use for id:1 (= UART0)CAT_port_id: the CAT port we want to connect to1 = UART1 connected to A/A+B CAT port.2 = UART2 connected to B CAT port. | Set the selection to CAT port A/A+B, and local UART0#UART-CAT-LINK_1,1 |
| USBA-DISCONNECT-MODE | Set USB device auto-disconnection mode. | COMMAND#USBA-DISCONNECT-MODE_USBADevice,modeFEEDBACK~nn@USBA-DISCONNECT-MODE_modeLF> | USBDevice - USB device number1 - USB Device 12 - USB Device 23 - USB Device 34 - USB Device 4mode - On/Off0 - Off1 - On | Set USB Device 1 polycom mode to ON:#USBA-DISCONNECT-MODE_,1 |
| USBA-DISCONNECT-MODE? | Get USB device auto-disconnection mode.. | COMMAND#USBA-DISCONNECT-MODE?_USBAdeviceFEEDBACK~nn@USBA-DISCONNECT-MODE_modeLF> | USBDevice - USB device number1 - USB Device 12 - USB Device 23 - USB Device 34 - USB Device 4mode - On/Off0 - Off1 - On | Get USB Device 1 polycom mode:#USBA-DISCONNECT-MODE? |
| USBC-ETH | Set USBC to Ethernet connection. | COMMAND#USBC-ETH_stateFEEDBACK~nn#USBC-ETH_state | state - On/Off0 - Off1 - On | Set USBC to Ethernet connection state to ON:#USBC-ETH_1 |
| VERSION? | Get firmware version number. | COMMAND|VERSION?_FEEDBACK~np#VERSION_firmware_version | firmware_version - XX.XX.XXXX where the digit groups are: major.minor.build version | Get the device firmware version number: |VERSION?_ |
Result and Error Codes
Syntax
In case of an error, the device responds with an error message. The error message syntax:
- \~NN@ERR XXX
– when general error, no specific command - \~NN@CMD ERR XXX
– for specific command - NN – machine number of device, default = 01
- XXX - error code
Error Codes
| Error Name | Error Code | Description |
| P3K_NO_ERROR | 0 | No error |
| ERR_PROTOCOL_SYNTAX | 1 | Protocol syntax |
| ERR_COMMAND_NOT_AVAILABLE | 2 | Command not available |
| ERR_PARAMETER_OUT_OF_RANGE | 3 | Parameter out of range |
| ERR_UNAUTHORIZED_ACCESS | 4 | Unauthorized access |
| ERR_INTERNAL_FW_ERROR | 5 | Internal FW error |
| ERR_BUSY | 6 | Protocol busy |
| ERR_WRONG_CRC | 7 | Wrong CRC |
| ERR_TIMEDOUT | 8 | Timeout |
| ERR_RESERVED | 9 | (Reserved) |
| ERR_FW_NOT_ENOUGH_SPACE | 10 | Not enough space for data (firmware, FPGA...) |
| ERR_FS_NOT_ENOUGH_SPACE | 11 | Not enough space – file system |
| ERR_FS_FILE_NOT_EXISTS | 12 | File does not exist |
| ERR_FS_FILE_CANT_CREATED | 13 | File can't be created |
| ERR_FS_FILE_CANT_OPEN | 14 | File can't open |
| ERR_FEATURE_NOT_SUPPORTED | 15 | Feature is not supported |
| ERR_RESERVED_2 | 16 | (Reserved) |
| ERR_RESERVED_3 | 17 | (Reserved) |
| ERR_RESERVED_4 | 18 | (Reserved) |
| ERR_RESERVED_5 | 19 | (Reserved) |
| ERR_RESERVED_6 | 20 | (Reserved) |
| ERR_PACKET_CRC | 21 | Packet CRC error |
| ERR_PACKET_MISSED | 22 | Packet number isn't expected (missing packet) |
| ERR_PACKET_SIZE | 23 | Packet size is wrong |
| ERR_RESERVED_7 | 24 | (Reserved) |
| ERR_RESERVED_8 | 25 | (Reserved) |
| ERR_RESERVED_9 | 26 | (Reserved) |
| ERR_RESERVED_10 | 27 | (Reserved) |
| ERR_RESERVED_11 | 28 | (Reserved) |
| ERR_RESERVED_12 | 29 | (Reserved) |
| ERR_EDID_CORRUPTED | 30 | EDID corrupted |
| ERR_NON_LISTED | 31 | Device specific errors |
| ERR_SAME_CRC | 32 | File has the same CRC – not changed |
| ERR_WRONG_MODE | 33 | Wrong operation mode |
| ERR_NOT_CONFIGURED | 34 | Device/chip was not initialized |
The warranty obligations of Kramer Electronics Inc. ("Kramer Electronics") for this product are limited to the terms set forth below:
What is Covered
This limited warranty covers defects in materials and workmanship in this product.
What is Not Covered
This limited warranty does not cover any damage, deterioration or malfunction resulting from any alteration, modification, improper or unreasonable use or maintenance, misuse, abuse, accident, neglect, exposure to excess moisture, fire, improper packing and shipping (such claims must be presented to the carrier), lightning, power surges, or other acts of nature. This limited warranty does not cover any damage, deterioration or malfunction resulting from the installation or removal of this product from any installation, any unauthorized tampering with this product, any repairs attempted by anyone unauthorized by Kramer Electronics to make such repairs, or any other cause which does not relate directly to a defect in materials and/or workmanship of this product. This limited warranty does not cover cartons, equipment enclosures, cables or accessories used in conjunction with this product.
Without limiting any other exclusion herein, Kramer Electronics does not warrant that the product covered hereby, including, without limitation, the technology and/or integrated circuit(s) included in the product, will not become obsolete or that such items are or will remain compatible with any other product or technology with which the product may be used.
How Long this Coverage Lasts
The standard limited warranty for Kramer products is seven (7) years from the date of original purchase, with the following exceptions:
- All Kramer VIA hardware products are covered by a standard three (3) year warranty for the VIA hardware and a standard three (3) year warranty for firmware and software updates; all Kramer VIA accessories, adapters, tags, and dongles are covered by a standard one (1) year warranty.
- Kramer fiber optic cables, adapter-size fiber optic extenders, pluggable optical modules, active cables, cable retractors, ring mounted adapters, portable power chargers, Kramer speakers, and Kramer touch panels are covered by a standard one (1) year warranty. Kramer 7-inch touch panels purchased on or after April 1st, 2020 are covered by a standard two (2) year warranty.
- All Kramer Calibre products, all Kramer Minicom digital signage products, all HighSecLabs products, all streaming, and all wireless products are covered by a standard three (3) year warranty.
- All Sierra Video MultiViewers are covered by a standard five (5) year warranty.
- Sierra switchers & control panels are covered by a standard seven (7) year warranty (excluding power supplies and fans that are covered for three (3) years).
- K-Touch software is covered by a standard one (1) year warranty for software updates.
- All Kramer passive cables are covered by a lifetime warranty.
Who is Covered
Only the original purchaser of this product is covered under this limited warranty. This limited warranty is not transferable to subsequent purchasers or owners of this product.
What Kramer Electronics Will Do
Kramer Electronics will, at its sole option, provide one of the following three remedies to whatever extent it shall deem necessary to satisfy a proper claim under this limited warranty:
- Elect to repair or facilitate the repair of any defective parts within a reasonable period of time, free of any charge for the necessary parts and labor to complete the repair and restore this product to its proper operating condition. Kramer Electronics will also pay the shipping costs necessary to return this product once the repair is complete.
- Replace this product with a direct replacement or with a similar product deemed by Kramer Electronics to perform substantially the same function as the original product. If a direct or similar replacement product is supplied, the original product's end warranty date remains unchanged and is transferred to the replacement product.
- Issue a refund of the original purchase price less depreciation to be determined based on the age of the product at the time remedy is sought under this limited warranty.
What Kramer Electronics Will Not Do Under This Limited Warranty
If this product is returned to Kramer Electronics or the authorized dealer from which it was purchased or any other party authorized to repair Kramer Electronics products, this product must be insured during shipment, with the insurance and shipping charges prepaid by you. If this product is returned uninsured, you assume all risks of loss or damage during shipment. Kramer Electronics will not be responsible for any costs related to the removal or re-installation of this product from or into any installation. Kramer Electronics will not be responsible for any costs related to any setting up this product, any adjustment of user controls or any programming required for a specific installation of this product.
How to Obtain a Remedy Under This Limited Warranty
To obtain a remedy under this limited warranty, you must contact either the authorized Kramer Electronics reseller from whom you purchased this product or the Kramer Electronics office nearest you. For a list of authorized Kramer Electronics resellers and/or Kramer Electronics authorized service providers, visit our web site at www.kramerav.com or contact the Kramer Electronics office nearest you.
In order to pursue any remedy under this limited warranty, you must possess an original, dated receipt as proof of purchase from an authorized Kramer Electronics reseller. If this product is returned under this limited warranty, a return authorization number, obtained from Kramer Electronics, will be required (RMA number). You may also be directed to an authorized reseller or a person authorized by Kramer Electronics to repair the product.
If it is decided that this product should be returned directly to Kramer Electronics, this product should be properly packed, preferably in the original carton, for shipping. Cartons not bearing a return authorization number will be refused.
Limitation of Liability
THE MAXIMUM LIABILITY OF KRAMER ELECTRONICS UNDER THIS LIMITED WARRANTY SHALL NOT EXCEED THE ACTUAL PURCHASE PRICE PAID FOR THE PRODUCT. TO THE MAXIMUM EXTENT PERMITTED BY LAW, KRAMER ELECTRONICS IS NOT RESPONSIBLE FOR DIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY BREACH OF WARRANTY OR CONDITION, OR UNDER ANY OTHER LEGAL THEORY. Some countries, districts or states do not allow the exclusion or limitation of relief, special, incidental, consequential or indirect damages, or the limitation of liability to specified amounts, so the above limitations or exclusions may not apply to you.
Exclusive Remedy
TO THE MAXIMUM EXTENT PERMITTED BY LAW, THIS LIMITED WARRANTY AND THE REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, REMEDIES AND CONDITIONS, WHETHER ORAL OR WRITTEN, EXPRESS OR IMPLIED. TO THE MAXIMUM EXTENT PERMITTED BY LAW, KRAMER ELECTRONICS SPECIFICALLY DISCLAIMS ANY AND ALL IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IF KRAMER ELECTRONICS CANNOT LAWFULLY DISCLAIM OR EXCLUDE IMPLIED WARRANTIES UNDER APPLICABLE LAW, THEN ALL IMPLIED WARRANTIES COVERING THIS PRODUCT, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, SHALL APPLY TO THIS PRODUCT AS PROVIDED UNDER APPLICABLE LAW. IF ANY PRODUCT TO WHICH THIS LIMITED WARRANTY APPLIES IS A "CONSUMER PRODUCT" UNDER THE MAGNUSON-MOSS WARRANTY ACT (15 U.S.C.A. §2301, ET SEQ.) OR OTHER APPLICABLE LAW, THE FOREGOING DISCLAIMER OF IMPLIED WARRANTIES SHALL NOT APPLY TO YOU, AND ALL IMPLIED WARRANTIES ON THIS PRODUCT, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR THE PARTICULAR PURPOSE, SHALL APPLY AS PROVIDED UNDER APPLICABLE LAW.
Other Conditions
This limited warranty gives you specific legal rights, and you may have other rights which vary from country to country or state to state. This limited warranty is void if (i) the label bearing the serial number of this product has been removed or defaced, (ii) the product is not distributed by Kramer Electronics or (iii) this product is not purchased from an authorized Kramer Electronics reseller. If you are unsure whether a reseller is an authorized Kramer Electronics reseller, visit our web site at www.kramerav.com or contact a Kramer Electronics office from the list at the end of this document. Your rights under this limited warranty are not diminished if you do not complete and return the product registration form or complete and submit the online product registration form. Kramer Electronics thanks you for purchasing a Kramer Electronics product. We hope it will give you years of satisfaction.

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ISO 9001 Certified Quality Management System IQC Institute of Quality & Control MONT. SAS. RvA C SEC ISO 14001 Certified Environmental Management System IQC Institute of Quality & Control ISO 27001:2013 Certified Information Security Management System IQC Institute of Quality & Control ISO 45001:2018 Certified O.H.S Management SystemHDMI™
HIGH-DEFINITION MULTIMEDIA INTERFACE

P/N: 2900-301682

Rev: 7


SAFETY WARNING
Disconnect the unit from the power supply before opening and servicing
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