Teltonika TRB236 Industrial LTE 450 IoT Gateway

Teltonika TRB236: Industrial LTE 450 IoT Gateway

The Teltonika TRB236 is an industrial IoT gateway built specifically for LTE 450 private networks. It delivers LTE Cat 1 or Cat 4 connectivity over the 450 MHz band – a low-frequency licensed spectrum used by utilities, energy operators, and critical infrastructure providers across Europe. The 450 MHz band offers superior signal propagation and building penetration compared to standard LTE frequencies, making the TRB236 the right choice for remote substations, meter cabinets, underground infrastructure, and sites where higher-band LTE is unavailable or unreliable.

Equipped with RS232, RS485, Ethernet, and configurable digital I/O via a 16-pin industrial terminal block, the TRB236 connects legacy field equipment directly to IP networks. Dual SIM and eSIM support keep the connection active through automatic failover. RutOS delivers a full software stack including VPN, Modbus, MQTT, and Teltonika RMS remote management – all in a compact DIN rail-mountable enclosure rated for -40 to +40°C.

Key Features

• LTE 450 MHz connectivity – Band 31 (452.5-457.5 MHz), Band 72 (451-456 MHz), and Band 87 (410-415 MHz) for private utility network access. See our LTE 450 explainer for a full overview of this technology.
• Cat 1 or Cat 4 modem variant – choose the variant that matches your network operator’s deployment
• Standard LTE fallback – FDD bands 1, 3, 7, 8, 20, 28 and TDD bands 38, 40 for hybrid public/private deployments
• 3G WCDMA fallback – bands 1 and 8 for maximum backward compatibility
• RS232 and RS485 serial interfaces for Modbus RTU, DNP3, and legacy field protocol integration
• Configurable digital I/O via 16-pin industrial terminal block for remote switching and monitoring
• Dual SIM + eSIM with automatic failover – supports auto-switch on weak signal, data limit, roaming, and network denial
• Wide-range 9-57 VDC power input via 16-pin terminal block – suitable for DC supply rails in grid infrastructure
• RutOS with VPN, MQTT, Modbus TCP, and industrial protocol support
• Teltonika RMS compatible for centralised remote monitoring, configuration, and firmware updates
• CE and UKCA certified

What the TRB236 is Used For

Smart Meter Gateways on Private LTE 450 Networks

Energy distribution operators deploying private LTE 450 networks use the TRB236 to connect smart meters, meter data concentrators, and data management systems. The 450 MHz band provides the reach to connect meters in basements, utility rooms, and rural locations that standard LTE bands cannot reliably serve. RS485 and Modbus RTU support integration with IEC 62056 DLMS/COSEM metering protocols.

Substation Automation and Grid Telemetry

Distribution system operators use the TRB236 to backhaul SCADA data from remote substations over private LTE 450 infrastructure. RS232 and RS485 interfaces allow direct connection to RTUs, IEDs, and legacy telecontrol equipment. The wide-range 9-57 VDC input is compatible with standard substation DC supplies, and the -40 to +40°C operating range covers most indoor cabinet environments.

Water and Gas Utility Telemetry

Water and gas distribution operators use the TRB236 to collect remote telemetry data from pumping stations, pressure monitoring points, and flow meters across wide geographic areas. The 450 MHz signal reaches rural sites and isolated infrastructure where higher-band LTE coverage is not available. Configurable digital I/O pins enable direct monitoring of valve states, pressure alarms, and pump status.

Remote Infrastructure Monitoring in Coverage Gaps

Transmission and distribution network operators use the TRB236 to connect remote sites where no public LTE coverage exists and a private 450 MHz network is the only viable connectivity option. The TRB236 supports hybrid operation – connecting to a private 450 MHz network where available and falling back to public LTE on standard bands where the private network has not yet been deployed.

Critical IoT in Urban Basement and Underground Environments

The deep building penetration of the 450 MHz band makes the TRB236 suitable for connecting meters, sensors, and control equipment installed in basements, below-ground cabinets, and dense urban environments where higher-band LTE signals are significantly attenuated. 450 MHz signals propagate through reinforced concrete and masonry that would block a standard LTE connection.

Public Safety and Emergency Communications Backhaul

National and regional agencies with licensed 410-450 MHz spectrum use the TRB236 to provide data connectivity at emergency sites, remote command posts, and temporary infrastructure. The Band 87 support (410-415 MHz) extends coverage to critical safety networks operating in this range.

Frequently Asked Questions

What is LTE 450 and why does it matter for utilities?

LTE 450 is 4G LTE connectivity delivered over the 450 MHz frequency band rather than the 700 MHz to 2.6 GHz bands used by mainstream public mobile networks. The 450 MHz band travels further from each cell tower and penetrates buildings and underground structures more effectively than higher frequencies. Several European countries have licensed this spectrum specifically to energy operators and utilities for private network deployments. This means a utility can operate its own dedicated LTE network for smart metering, grid automation, and field telemetry, without relying on public mobile infrastructure. Our LTE 450 explainer covers this in detail.

What is the difference between the TRB236 Cat 1 and Cat 4 variants?

The TRB236 is available in two modem variants. The Cat 1 variant uses LTE Category 1, which provides lower peak data rates (typically 10 Mbps down / 5 Mbps up) but draws less power – well-suited to SCADA telemetry, meter data collection, and low-bandwidth IoT applications. The Cat 4 variant uses LTE Category 4, which supports up to 150 Mbps down / 50 Mbps up – more appropriate where video surveillance, large firmware updates, or higher-volume data transfers are required. Both variants support the same 450 MHz band set and have the same interface configuration. Check with your account manager or contact us for current variant availability.

Does the TRB236 support standard public LTE networks as well as 450 MHz?

Yes. The TRB236 supports LTE FDD bands 1, 3, 7, 8, 20, and 28 alongside the 450 MHz bands (31, 72, 87), plus 3G WCDMA on bands 1 and 8. This means the TRB236 can operate on a private 450 MHz network where available and fall back to a public LTE network in areas where the private network has not yet been deployed or where coverage is temporarily unavailable. An IoT SIM card with multi-network roaming is typically the best choice for this hybrid deployment model.

Does the TRB236 support Teltonika RMS?

Yes. The TRB236 runs RutOS and is fully compatible with Teltonika RMS, the cloud-based remote management system. RMS allows centralised monitoring, configuration, and firmware updates across large gateway fleets – which is particularly relevant for utility operators managing thousands of remote sites. RMS connections work over the 450 MHz link as well as standard LTE.

What industrial protocols does the TRB236 support?

The TRB236 runs RutOS, which supports Modbus TCP and Modbus RTU, MQTT, DLMS/COSEM (for metering), DNP3, and OPC UA. The RS485 interface enables direct connection to Modbus RTU field devices. Specific protocol availability depends on firmware version – verify the current feature set at wiki.teltonika-networks.com.

What SIM card does the TRB236 need?

For public LTE connectivity, the TRB236 takes a standard Mini SIM (2FF) in either of its two SIM slots. For private LTE 450 networks, the SIM will be provisioned by the private network operator. For hybrid deployments or fallback to public networks, a multi-network IoT SIM card with coverage on the required LTE bands is the recommended approach. Contact our team to discuss the right SIM for your deployment.

Related Products and Further Reading

The TRB236 is designed for LTE 450 private network deployments – a specialist application well covered in our What is LTE 450? explainer. For sites where standard 4G connectivity is sufficient, the Teltonika IoT gateway range includes options such as the TRB246 (LTE Cat 4 with RS232, RS485, and I/O). For deployments requiring secure remote access over cellular, see our guide to VPN on cellular routers. For IoT SIM cards compatible with this gateway, visit our SIM connectivity page.