The RUT204 from Teltonika Networks is a compact industrial cellular router that combines a native CAN FD interface with LTE Cat 4 connectivity in a single aluminium-housed unit. It is aimed at vehicle and machine data applications where CAN traffic has to reach a local or cloud server over a mobile network, without adding a separate CAN gateway next to the router.
Alongside the CAN hardware, the device integrates GNSS positioning, Wi-Fi 4, two Fast Ethernet ports, an RS232 serial port and a wide 9–57 V DC power input. It runs RutOS, Teltonika's OpenWrt-based Linux operating system, and connects to the Remote Management System (RMS) for remote configuration and fleet monitoring. The housing measures 83 × 25 × 83 mm, weighs 139.6 g and carries an IP30 rating.
RUT204 at a Glance
The RUT204 belongs to Teltonika's RUT2 series and shares its MediaTek platform with the RUT202, but adds the native CAN interface and GNSS. The table below lists the key verified specifications.
| Category | Specification |
|---|---|
| Cellular | 4G LTE Cat 4, up to 150 Mbps downlink / 50 Mbps uplink; 3G up to 21 / 5.76 Mbps; 2G fallback |
| SIM | Dual SIM – 2 × internal Mini-SIM (2FF), 1.8 V / 3 V; eSIM support (per Teltonika product materials) |
| CAN / Serial | Native CAN FD and RS232 on a shared 6-pin terminal block |
| Positioning | GNSS: GPS, GLONASS, BeiDou, Galileo |
| Wi-Fi | 802.11 b/g/n (Wi-Fi 4), Access Point and Station modes |
| Ethernet | 2 × RJ45, 10/100 Mbps: 1 × WAN (configurable as LAN), 1 × LAN |
| Processor / Memory | MediaTek MIPS 24KEc, 575/580 MHz; 128 MB DDR2 RAM; 32 MB SPI flash; microSD up to 2 TB |
| Power | 2-pin DC socket, 9–57 V DC; Active PoE-in 802.3af Class 0 (12.94 W) on LAN port; Passive PoE-in 16–57 V DC |
| Operating temperature | −40 °C to +75 °C |
| Protection / Housing | IP30; aluminium housing; 83 × 25 × 83 mm; 139.6 g |
| Operating system | RutOS (OpenWrt-based Linux) |
Native CAN FD Interface and Serial Port
The distinguishing feature of the RUT204 is its native CAN FD interface. CAN traffic is read directly by the router, so a separate CAN-to-serial or CAN-to-Ethernet converter is not required in the signal path. The CAN interface and the RS232 port share a single 6-pin terminal block on the device.
On the software side, Teltonika lists CANopen client and SAE J1939 client support among the RutOS services with a "Planned" status. The physical CAN FD hardware is present on the device today; the higher-level protocol clients are documented as planned rather than shipping features. Buyers who require CANopen or J1939 handling in firmware should confirm the current RutOS release status before deployment.
The RS232 port and RutOS data services (Modbus, Data to Server, MQTT gateway functions) allow the router to collect data from serial and CAN-based equipment and forward it to a local server or a cloud platform.
Cellular Connectivity, Dual SIM and Positioning
The cellular modem operates at LTE Cat 4, with up to 150 Mbps downlink and 50 Mbps uplink, and falls back to 3G and 2G where LTE is unavailable. Two internal Mini-SIM (2FF) slots provide Dual SIM operation for automatic switching between carriers or data plans; Teltonika's product materials also state eSIM support. SIM switching, band management and SIM idle protection are handled in RutOS.
Integrated GNSS supports GPS, GLONASS, BeiDou and Galileo, which allows the same device to report position data alongside the CAN and serial data it collects. This combination is the practical basis for telematics use, where vehicle location and machine data are transmitted together over the mobile network.
Interfaces, Power and PoE-in
The RUT204 provides two 10/100 Mbps RJ45 ports (one WAN, configurable as LAN, and one LAN), Wi-Fi 4 in Access Point or Station mode, and dedicated antenna connectors: two SMA for mobile, one RP-SMA for Wi-Fi and one SMA for GNSS.
The wide 9–57 V DC input over the 2-pin DC socket suits vehicle and industrial power rails. The LAN port additionally accepts Active PoE-in per 802.3af Class 0 (12.94 W) or Passive PoE-in at 16–57 V DC, so the router can be powered over the Ethernet cable where a local DC supply is not convenient. The aluminium housing and the −40 °C to +75 °C operating range allow installation outside temperature-controlled rooms.
| Interface | Detail |
|---|---|
| Ethernet | 2 × RJ45 10/100 Mbps (1 × WAN configurable as LAN, 1 × LAN) |
| Serial / CAN | 6-pin terminal block: RS232 + CAN FD |
| Wireless | Wi-Fi 4 (802.11 b/g/n), AP / STA |
| Antennas | 2 × SMA (mobile), 1 × RP-SMA (Wi-Fi), 1 × SMA (GNSS) |
| Storage | microSD up to 2 TB |
| Power | 9–57 V DC (2-pin); Active/Passive PoE-in on LAN port |
RutOS Software, Security and Remote Management
The RUT204 runs RutOS, Teltonika's OpenWrt-based firmware. It includes a range of VPN and tunnelling options — among them OpenVPN, IPsec, WireGuard, GRE, L2TP, DMVPN and ZeroTier — along with firewall, access control, VLAN and 802.1x. Management is available through the web UI, SSH, SNMP, MQTT, TR-069 and JSON-RPC.
For deployments at scale, the router connects to Teltonika's Remote Management System (RMS) for zero-touch provisioning, remote configuration, firmware updates over the air and status monitoring. RutOS also lists connectors for third-party platforms including Azure IoT Hub, AWS IoT Core, Cumulocity and ThingWorx.
Application Areas
The following applications follow directly from the documented hardware and interfaces.
Fleet telematics
GNSS positioning combined with the native CAN FD interface lets a single device report vehicle location and CAN data over LTE, without a separate tracking unit and CAN gateway.
GNSS + CAN FDConstruction and heavy machinery
The −40 °C to +75 °C range, aluminium housing and 9–57 V DC input support mounting on mobile equipment and in cabinets that are not climate-controlled.
−40…+75 °C · 9–57 V DCIndustrial and legacy equipment
The RS232 port together with RutOS Modbus and Data to Server functions connects PLCs, controllers and serial devices to a server or cloud platform.
RS232 + ModbusRemote sites and kiosks
LTE Cat 4 with Dual SIM, Wi-Fi 4 and PoE-in allows single-cable powering and local wireless access at sites without fixed-line connectivity.
LTE + Wi-Fi + PoE-inFeatured Product
- Teltonika RUT204 — LTE Cat 4 router (150/50 Mbps) with native CAN FD, Wi-Fi 4, GNSS, RS232, 2 × Ethernet 10/100, Dual SIM + eSIM, PoE-in, 9–57 V DC, −40 °C to +75 °C, IP30, 83 × 25 × 83 mm.
