LB621C - Router Black Box - Free user manual and instructions

Product Type	8-Port 100-Mbps Fiber Fast Ethernet Switch Module
Connector Type	SC duplex multimode
Ports	8 x 100BASE-FX (multimode fiber)
Data Rate	100 Mbps (Fast Ethernet)
Compatibility	Black Box Modular Managed L2 Switches (LB610A, LB611A)
Hot-Swappable	Yes
Standards	IEEE 802.3u 100BASE-FX
Fiber Type	Multimode (typical 62.5/125 µm or 50/125 µm)
Maximum Distance	2 km (with 62.5/125 µm fiber at 100 Mbps)
Wavelength	1300 nm (typical for 100BASE-FX multimode)
Power Consumption	Supplied by chassis; no separate power requirement
Dimensions (Module only)	Approximately 1.5" H x 6.5" W x 8" D (estimated for standard module)
Weight	Approximately 1.5 lb (0.7 kg)
Management	Managed via chassis (SNMP, Web, Telnet, Console)
VLAN Support	Via chassis configuration
Quality of Service (QoS)	Via chassis (802.1p)
Spanning Tree	Via chassis (802.1d, 802.1w)
Link Aggregation	Via chassis (802.3ad LACP)
Port Mirroring	Via chassis
Broadcast Storm Protection	Via chassis
RoHS Compliant	Yes

Frequently Asked Questions - LB621C Black Box

What is the Black Box LB621C?

The Black Box LB621C is an 8-port 100-Mbps Fast Ethernet fiber switch module that uses SC multimode connectors. It is designed for use with Black Box Modular Managed L2 Switches (LB610A/LB611A).

What type of fiber does the LB621C support?

It supports multimode fiber (typically 62.5/125 µm or 50/125 µm) with SC duplex connectors, operating at 100 Mbps and 1300 nm wavelength.

What is the maximum distance for the LB621C?

With 62.5/125 µm multimode fiber, the maximum distance is 2 km at 100 Mbps.

Is the LB621C hot-swappable?

Yes, the LB621C is hot-swappable and can be inserted or removed from the chassis without powering down the switch.

Which chassis are compatible with the LB621C?

The LB621C is compatible with Black Box LB610A and LB611A Modular Managed L2 Switches that have slots for 8-port Fast Ethernet modules.

Does the LB621C require external power?

No, the LB621C draws power directly from the chassis. It does not have a separate power supply.

Can the LB621C be managed?

The module itself is not directly manageable, but when installed in a managed chassis, it supports all chassis management features such as SNMP, Web, Telnet, and Console.

What is the part number for the AC power supply for the chassis?

The AC power supply for the LB610A/LB611A chassis is ordered separately as LB611C-AC (120-240 VAC input, 5 VDC output).

Does the LB621C support VLAN?

Yes, VLAN support is provided by the chassis, including port-based VLAN and 802.1Q-in-Q tagging.

What is the warranty for the LB621C?

Black Box typically offers a lifetime warranty on hardware, but please verify with their support or documentation.

USER MANUAL LB621C Black Box

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Modular Managed L2 Switch

Provides two Gigabit dual-media ports plus three slots for hot-swappable, 8-port Fast Ethernet modules.

Exterior view of a black network switch device (no visible text or symbols on the main body)

FEaturEs

» Manageable through SNMP or any standard Web browser.
» Three slots support 8-port 10-/100-Mbps copper modules or 100-Mbps fiber modules.
» Two dual-media ports support 100- or 1000-Mbps SFPs or function as copper ports.
» Order an AC (LB611C-AC) or DC (AC611C-DC) power supply separately.
» Easy to manage and configure.
» Robust security with VLAN capabilities, as well as port security and IGMP snooping.
» 802.1d Spanning Tree and 802.1w Rapid Spanning Tree enable you to configure the switch with a redundant backup path.
» Virtual Stacking Management (VSM) enables you to manage up to 16 switches with one IP address.
» 802.1x access control improves network security by enabling user authentication for each network access attempt.
» Port mirroring enables you to use a protocol analyzer to track network errors or abnormal packet transmission without interrupting data flow.
» The isolated group feature enables you to designate certain ports as protected.
» Broadcast storm protection.
» RoHS compliant.
» Includes a 19" rackmount kit.
» Has one or two internal power supplies.

Port-based VLAN application.

graph TD
    A["Modular Managed L2 Switch (LB610A)"] --> B["VLAN 1 VLAN 4"]
    A --> C["VLAN 2 VLAN 3"]
    A --> D["VLAN 3"]
    A --> E["VLAN 4"]
    A --> F["VLAN 5"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#ccf,stroke:#333
    style D fill:#ccf,stroke:#333
    style E fill:#ccf,stroke:#333
    style F fill:#ccf,stroke:#333

OVERVIEW

The Modular Managed L2 Switch is a versatile data center workhorse that features three slots, each supporting a hot-swappable 8-port copper or fiber Fast Ethernet module. The switch also has two dual-media ports that can support Gigabit Ethernet SFPs or function as a copper port. Models are available with one or two power supply slots (LB610A or LB611A).

Fully manageable

The switch is fully manageable through any standard Web browser over an IP network—even the Internet. It also supports SNMP v1 and v2 for easy integration into any managed network.

Bandwidth aggregation

MAC-based 802.3ad LACP Link Aggregation Control Protocol (LACP) enables you to bundle multiple ports to create a single high-bandwidth pipeline. You can set up two Fast Ethernet groups plus one Gigabit Ethernet group, with a per-group maximum of four ports. The switch can aggregate destination addresses (DA), source addresses (SA), or both. Link failover automatically shifts network traffic onto remaining ports if a port fails.

QoS

802.1p Quality Of Service (QoS), helps to ensure that important network traffic gets through first. QoS enables you to set up to four priority levels so that, for instance, VoIP traffic gets priority over Web browsing. This feature prioritizes data at full wire speed and can operate based on strict priority, weighted round robin, or a mix of both.

Q-in-Q VLAN for performance and security

The VLAN feature in the switch offers the benefits of both security and performance. VLAN is used to isolate traffic between different users and thus provides better security. Limiting the broadcast traffic to within the same VLAN broadcast domain also enhances performance. VLAN support enabling advanced techniques such as "802.1Q-in-1Q" to be deployed.

TECH SPECS

Environmental — Operating temperature: 32 to 104°F (0 to 40°C); Humidity: 5 to 90% noncondensing

Frame Buffer — 256 KB

MAC Addresses — 8 K

Management — SNMP, Console, Telnet, HTTP via embedded Web server

Standards — IEEE 802.3, 802.3u, 802.3ab, 802.3x, 802.3z, 802.1p, 802.1d,

802.1w, 802.3ad

CE Approval — Yes

RoHS — Yes

Power — LB610A: Internal power supply: autosensing 100–240 VAC, 50–60 Hz, 45 Watts;

LB611A requires (1) or (2) power modules (order separately):

LB611C-AC: Input: 120–240-VAC, 50–60-Hz; Output: 5 VDC, 17 Amps

Size — LB610A— LB611A: 1.75"H x 17.4"W x 11"D (4.4 x 44.2 x 28 cm)

Weight — LB610A: 7.5 lb. (3.4 kg); LB611A: 10.2 lb. (4.6 kg);

LB611C-AC: 3.3 lb. (1.5 kg)

Item Code

Select a switch..

Modular Managed L2 Switch

with AC Power Supply

with (2) Power-Supply Slots

LB610A

LB611A

...add one or two power supplies.

AC Power Supply for Modular Managed L2

Switches

LB611C-AC

...then populate the slots with up to three switch modules.

Switch Modules for Modular Managed L2 Switches

(8) 10BASE-T/100BASE-TX

LB620C

100-Mbps Fiber, Multimode

S C

LB621C

S T

LB622C

(8) 100-Mbps Fiber, Single-Mode, SC

LB623C

(8) 100-Mbps Fiber Single-Strand, Single-Mode, SC

(Order one of each)

(8) 1310-nm TX/1550-nm RX

(8) 1550-nm TX/1310-nm RX

LB624C

LB625C

To connect the switches to fiber-based Gigabit Ethernet, order...

Small Form-Factor Pluggable (SFP) Optical Transceivers

Multimode, 850-nm, 550 m

Single-Mode, 1310-nm, 10 km

Single-Mode, 1550-nm, 30 km

LGB200C-MLC

LGB200C-SLC10

LGB200C-SLC30

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