Teltonika TRB255 Industrial M2M LTE Cat 4 Gateway with Ethernet

The Teltonika TRB255 is an industrial M2M gateway built for low-power, long-range IoT connections. It uses LTE Cat M1 and NB-IoT networks with 2G fallback, and connects both modern and legacy equipment through RS232, RS485 and Ethernet. Dual SIM with automatic failover, multiple inputs/outputs and remote management make it a reliable choice for smart metering, utilities and remote monitoring.

Key Features

• LTE Cat M1 / NB-IoT: Low-power cellular technologies designed for IoT devices, with good coverage inside buildings and underground. 2G fallback included.
• Dual SIM with auto failover: Switches to the backup SIM automatically for continuous connection.
• RS232 and RS485 serial ports: Connect meters, PLCs and older industrial devices.
• Ethernet port: Connect modern IP-based equipment.
• Inputs and outputs: Monitor sensors and control equipment remotely.
• Modbus, SMS control, firewall and OpenVPN: Industrial communication and secure remote access.
• Teltonika RMS compatible: Monitor and manage your gateways from anywhere.

Ideal For

Smart metering · Utilities and energy · Industrial automation · Remote monitoring · Legacy serial equipment

Specifications

FAQ

Is this a 4G LTE Cat 4 gateway?
No. The TRB255 uses LTE Cat M1 and NB-IoT, which are low-power IoT networks with lower speeds than regular 4G. It is designed for small amounts of data, such as meter readings and sensor data, not for internet browsing or video.

Will it work with my SIM card?
Your mobile operator must support LTE Cat M1 or NB-IoT in your area. Please check with your operator or contact us before ordering.

Can I connect older serial devices?
Yes. It has both RS232 and RS485 serial interfaces.