TRB236 – industrial LTE 450 IoT gateway with dual SIM, RS232, RS485 and industrial protocols
The Teltonika TRB236 is an industrial LTE 450 IoT gateway for reliable connectivity in hard-to-reach environments. This model supports LTE Cat 1 or LTE Cat 4 communications over the 450 MHz band and is designed for remote utility and infrastructure deployments. With Ethernet, RS232, RS485 and configurable digital inputs and outputs, the gateway connects industrial field devices to IP networks for continuous monitoring and control. Dual SIM supports connection continuity, while broad support for industrial protocols makes the gateway deployable within critical IoT environments. As such, the TRB236 fits into professional installations where range, serial integration and remote management come together.
LTE 450 gateway positioning for utilities, infrastructure and industrial field equipment
The TRB236 is positioned for utility and infrastructure applications where extended coverage over the 450 MHz band is relevant. In this role, the device acts as a gateway between legacy field equipment and IP networks, with support for both serial communications and mobile backhaul. The combination of dual SIM, industrial interfaces and protocol support makes this model suitable for continuous monitoring and control within private and utility LTE 450 networks. Thereby, the gateway connects to environments where industrial field equipment needs to be remotely connected and managed.
Why TRB236?
- LTE 450 over the 450 MHz band – supports extended coverage and signal reliability in utility environments.
- LTE Cat 1 / 2G or LTE Cat 4 / 3G depending on order code – allows connection to local network availability.
- Dual SIM – supports network redundancy, backup WAN and multiple switching scenarios.
- Ethernet, RS232 and RS485 – connects legacy equipment to IP networks without additional protocol converters.
- 3 configurable digital inputs, 3 configurable digital outputs and 1 analog input – expands the gateway for industrial signaling and control.
- RMS support – supports central management, configuration, access and FOTA in remote deployments.
Applications
- Utility Networks
- Remote infrastructure deployments
- Connecting industrial field equipment to IP networks
- Continuous monitoring and control
- Private LTE 450 networks
- Utility LTE 450 networks
Key features
- Industrial LTE 450 IoT gateway
- LTE Cat 4 up to 150 DL / 50 UL Mbps or LTE Cat 1 up to 10 DL / 5 UL Mbps, depending on order code
- Dual SIM
- 1 x ETH port, 10/100 Mbps
- RS232
- RS485
- 3 x Configurable Digital Inputs
- 3 x Configurable Digital Outputs
- 1 x Analog input (0 – 30 V)
- RutOS (OpenWrt based Linux OS)
- RMS
LTE 450 gateway technology, interfaces and integration
The TRB236 combines mobile LTE 450 connectivity with industrial interfaces for integration into existing field deployments. The device features Ethernet, RS232 and RS485, supporting protocols such as Modbus, BacNET, OPC UA, DNP3 and DLMS/COSEM. Features such as Data to Server, MQTT Gateway and Teltonika Networks Web API are also present, allowing data to be transferred from serial and industrial environments to IP and cloud environments. This makes the gateway suitable for environments where industrial communications and network connectivity must work logically together.
LTE 450 gateway management and configuration
For management, the TRB236 supports WEB UI, FOTA, SSH, SMS, Call, TR-069, MQTT, SNMP, JSON-RPC and Teltonika Remote Management System. In addition, cloud integrations are available for ThingWorx, Cumulocity, Azure IoT Hub and AWS IoT Core. The flyer explicitly mentions RMS for management, alerts, configuration, access and FOTA. This makes this model suitable for central management and remote configuration within larger-scale deployments.
Connectivity specifications
Mobile
- 4G LTE Cat 4 up to 150 DL/50 UL Mbps; 3G up to 21 DL/5.76 UL Mbps
- 4G LTE Cat 1 up to 10 DL/5 UL Mbps; 2G up to 236.8 DL/236.8 UL Kbps
- 3GPP Release 9
SIM
- 2 x SIM slots (Mini SIM – 2FF), 1.8 V/3 V, double stacked SIM tray
- Dual SIM with network redundancy, backup WAN and switching scenarios
Ethernet
- 1 x ETH port, 10/100 Mbps
- IEEE 802.3, IEEE 802.3u, 802.3az
- Supports auto MDI/MDIX crossover
Serial
- RS232 terminal block connector: TX, RX, RTS, CTS
- RS485 terminal block connector: D+, D-, R+, R- (2 or 4 wire interface)
Technical specifications
System
- Mediatek, 580 MHz, MIPS 24KEc
- 128 MB
- 16 MB
Network
- Static routing
- Dynamic routing (BGP, OSPF v2, RIP v1/v2, EIGRP, NHRP)
Policy-based routing
- TCP, UDP, IPv4, IPv6, ICMP, NTP, DNS, HTTP, HTTPS, SFTP, FTP, SMTP, SSL/TLS, ARP, VRRP, PPP, PPPoE, UPNP, SSH, DHCP, Telnet, SMPP, SNMP, MQTT, Wake On Lan (WOL), VXLAN
Connection monitoring
- DHCP, QoS / Smart Queue Management (SQM), DDNS, DNS over HTTPS, Network backup, SSHFS, Traffic Management
Security and VPN
- Authentication
Firewall
- Attack prevention, VLAN, Mobile quota control, WEB filter, Access control, Certificate Manager, OpenVPN, IPsec, GRE, PPTP, L2TP, Stunnel, DMVPN, SSTP, ZeroTier, WireGuard, Tinc
Industry and services
- BacNET Router via RS485
- OPC UA Client, Server via TCP
- MODBUS Server, Client via RTU (RS232, RS485), TCP
- DNP3 Station, Outstation via RS232, RS485, TCP
- DLMS/COSEM Client via RS232, RS485, TCP
- Data to Server via HTTP(S), MQTT, Azure MQTT
- Modbus MQTT Gateway
- Teltonika Networks Web API (beta) support
Firmware and management
- RutOS (OpenWrt based Linux OS)
- WEB UI
- FOTA
- RMS
- Keep settings
- Factory settings reset
- Package Manager
- SDK package with build environment provided
Input/Output
- 3x Configurable Digital Inputs, 0 – 6 V detected as logic low, 8 – 30 V detected as logic high
- 1x Analog input (0 – 30 V)
- 3x Configurable Digital Outputs, Open collector output, max output 30 V, 300 mA
- Events: Email, RMS, SMS
- I/O juggler
Nutrition
- 2-pin in 16-pin industrial terminal block
- 9-57 VDC
- Idle: < 2 W, Max: < 5 W
Environment and hardware
Housing
- Anodized aluminum housing and panels
Interfaces
- 1 x RJ45 port, 10/100 Mbps
- 3 x Configurable digital I/O in 16-pin terminal block
- 2 x SIM slots (Mini SIM – 2FF), 1.8 V/3 V, double stacked SIM tray
- 1 x 16-pin terminal block
- 1 x SMA connector for Mobile
- RS232 4-pin into 16-pin terminal block (TX, RX, RTS, CTS)
- RS485 4-pin into 16-pin terminal block (D+, D-, R+, R-)
- Reboot/User default reset/Factory reset button
Dimensions and weight
- 83 x 25 x 79.8 mm
- 175 g
Montage
- DIN rail, wall mount, flat surface (all require additional kit)
- Environmental specifications
- Operating temperature -40 °C to 75 °C
- Operating humidity 10% to 90% non-condensing
- IP30
Certifications
- Certifications: CE, UKCA, EAC, UCRF, RCM, CB, WEEE
In the box
- Quick Start Guide
- Ethernet cable 1.5 m
- 2x8pin connector
- Hex key
- SIM adapter kit
