TRB255 - Uncategorized Teltonika - Free user manual and instructions
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| Product Type | Industrial LTE Router |
| Dimensions | 185 x 135 x 42 mm |
| Weight | 600 g |
| Power Input | 9 – 50 VDC |
| Main Functions | Cellular 4G/LTE, Dual SIM with failover, WiFi 4 (802.11b/g/n), GNSS, RS232/RS485 serial interface, Digital I/O |
| Maintenance & Cleaning | Keep in dry environment, clean with dry cloth, avoid moisture |
| Safety | Use only certified power adapter, do not expose to extreme temperatures |
| Spare Parts & Repairability | No user-serviceable parts, contact Teltonika support for repairs |
| General Information | Brand: Teltonika, Model: TRB255, Compliant with EU directives |
Frequently Asked Questions - TRB255 Teltonika
How do I reset the Teltonika TRB255 to factory defaults?
Press and hold the reset button (located on the front panel) for 10 seconds until the power LED starts blinking. Release and wait for the device to reboot.
How can I access the web interface of the TRB255?
Connect your computer to the router via Ethernet. Open a browser and enter the default IP address 192.168.1.1. Default username is admin and password is admin01.
What SIM card size does the TRB255 use?
The device uses standard micro SIM cards (2FF). They must be inserted with the metal contacts facing down.
Can I use two SIM cards simultaneously?
Yes, the TRB255 supports dual SIM with automatic failover. You can configure it to use one primary SIM and a backup, or switch based on signal strength.
How do I update the firmware on my TRB255?
Download the latest firmware from the Teltonika website. Log into the web interface, go to System -> Firmware, upload the .bin file and confirm. Do not power off during update.
What is the maximum WiFi range of the TRB255?
The WiFi range is typically up to 100 meters outdoors (line of sight) and up to 30 meters indoors, depending on obstacles.
How can I enable the GNSS feature?
Connect an active GPS antenna to the SMA connector labeled GNSS. Then, in the web interface under Services -> GNSS, enable GNSS and choose the desired service (GPS, GLONASS, etc.).
What power supply should I use for the TRB255?
Use a power supply that provides 9-50 VDC with a 2-pin terminal block connector. The device consumes up to 12W.
Can I mount the TRB255 on a DIN rail?
Yes, the device has an integrated DIN rail mounting bracket on the back, allowing easy installation in industrial panels.
How do I check the cellular signal strength?
On the device's LCD screen (if equipped) or via the web interface under Status -> Network, you can see the RSSI value in dBm.
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USER MANUAL TRB255 Teltonika
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Product information
Brand : Teltonika
Model : TRB255
Category : Uncategorized