Teltonika RUTM55 eSIM 5G Router

Teltonika RUTM55 – Industrial 5G Router with eSIM and Legacy Integration

The Teltonika RUTM55 is one of the most advanced industrial routers currently available, blending high-speed 5G with rugged industrial hardware and a unique set of features that make it equally suited to modern IoT deployments and legacy system integration. Unlike many 5G routers that only focus on throughput, the RUTM55 combines Dual-SIM, eSIM support, RS232/RS485 serial ports, digital and analogue I/O, and GNSS into a single, compact unit designed to operate in the harshest environments.

For organisations in energy, utilities, manufacturing, transport and critical infrastructure, the RUTM55 is more than just a router — it’s a long-term connectivity platform.

Product Description

The RUTM55 delivers 5G Sub-6 connectivity (SA and NSA) with download speeds of up to 3.4 Gbps and uplink rates of up to 900 Mbps. It falls back to 4G LTE Cat 19 for areas without 5G coverage, maintaining robust connectivity across multiple networks.

Where it stands apart is in its triple SIM system: two physical SIM slots plus an embedded eSIM with support for up to seven profiles. Combined with automatic SIM switching based on rules (signal strength, roaming status, quotas, link failure), the router can stay online even in challenging conditions.

On the hardware side, the RUTM55 integrates RS232 and RS485 for legacy serial devices, along with a block of digital/analogue I/O and a relay. It has 4 × Gigabit Ethernet ports, dual-band Wi-Fi 5 with MU-MIMO, and a dedicated GNSS receiver.

The chassis is anodised aluminium with an IP30 rating, tested for –40…+75 °C operation, and powered via a 9–50 VDC terminal input with passive PoE-in support.

Key Features

5G SA/NSA connectivity up to 3.4 Gbps DL, 900 Mbps UL
Dual-SIM + eSIM with multiple profile support and rule-based failover
Serial integration: RS232 and RS485 for PLCs, HMIs, sensors and controllers
Digital and analogue I/O plus relay for monitoring and control
4 × Gigabit Ethernet ports for LAN/WAN flexibility
Dual-band Wi-Fi 5 with MU-MIMO (up to 867 Mbps, 150 clients)
GNSS (GPS, GLONASS, BeiDou, Galileo, QZSS) with NMEA/NTRIP and geofencing
Security-rich: OpenVPN, WireGuard, IPsec, VLAN, firewall, DoH, TPM 2.0
RMS-ready for remote monitoring, provisioning and management
Industrial build: metal housing, IP30, DIN-rail/wall/flat mounting options, –40…+75 °C operation

Key Specification (at a glance)

Mobile: 5G Sub-6 (SA/NSA), 4G LTE Cat 19 fallback, Dual-SIM + eSIM (7 profiles)
Throughput: up to 3.4 Gbps DL, 900 Mbps UL on 5G
Ethernet: 4 × Gigabit (1 WAN + 3 LAN, configurable)
Wi-Fi: 802.11 b/g/n/ac Wave 2 (Wi-Fi 5), dual-band, MU-MIMO, up to 867 Mbps
Serial/I-O: RS232, RS485, 2 × digital inputs, 1 × analogue input, open-collector output, SPST relay
GNSS: GPS, GLONASS, BeiDou, Galileo, QZSS with NMEA/NTRIP, geofencing
Management: RutOS (OpenWrt-based), WebUI/CLI/SSH, RMS, TR-069, SNMP, MQTT
Security: OpenVPN, IPsec, WireGuard, DMVPN, SSTP, firewall/VLANs, 802.1X, Let’s Encrypt
Hardware: Dual-core 880 MHz CPU, 256 MB RAM, 16 MB NOR + 256 MB NAND flash
Power: 9–50 VDC, passive PoE-in on LAN1
Size/Weight: 132 × 44.2 × 95 mm, 430 g
Environment: –40…+75 °C, 10–90 % RH, IP30
Approvals: CE, UKCA, CB, RCM, EAC, WEEE

Applications

The RUTM55 is versatile across industries:

Energy and utilities – Secure connectivity for substations, metering, renewable energy sites.
Industrial automation – Connect PLCs, HMIs and legacy devices via RS232/RS485 with modern IP backhaul.
SCADA and telemetry – Reliable comms for water, power, gas, and process control networks.
Transport and logistics – GNSS tracking, mobile data uplink, depot Wi-Fi, and multi-operator resilience.
Retail and branch networks – Primary 5G WAN or failover link for continuity of service.
Critical infrastructure – Multi-SIM resilience, VPN-only access, and secure remote management.

SIM Options: eSIM, Roaming SIMs, IoT SIMs

One of the strengths of the RUTM55 is how it works with different SIM strategies:

eSIM (eUICC) – embedded SIM with up to 7 profiles, enabling remote provisioning and profile switching without site visits. Ideal for global rollouts or long-lifecycle projects.
Roaming SIMs (multi-network) – allow the router to connect to multiple carriers in a region, automatically selecting the strongest signal. Perfect for mobile or rural deployments.
IoT SIMs (M2M) – purpose-built for devices with static usage, often with fixed IPs or private APNs for secure connectivity. Frequently used in SCADA, CCTV and telemetry networks.

Combined with SIM switching rules (signal strength thresholds, quotas, roaming blocks), the RUTM55 can maintain uptime across carriers and profiles, even in adverse network conditions.

Antennas and Installation

Getting the best out of any 5G router depends heavily on antenna choice and installation. The RUTM55 uses:

4 × SMA connectors for 5G/LTE (MIMO)
2 × RP-SMA connectors for Wi-Fi
1 × SMA connector for GNSS

Best Practices for Antenna Setup

5G MIMO antennas – If the router, using the supplied 5G paddle antennas is installed in a location with poor 4G / 5G signal and an outdoor antenna is being installed then for full 5G performance, a 4×4 MIMO antenna is recommended. Ensure the outdoor IoT Antenna is installed in a location with good signal and take into account signal loss along the cables.
Cable quality – Avoid low-grade coax like RG58; instead use low-loss types (LMR-200/240/400 depending on run length).
Mounting – Place antennas externally, ideally with line-of-sight to the nearest mast. Roof-mount, wall-mount or pole-mount are typical for industrial deployments.
Wi-Fi coverage – Internal stubbies may suffice for local coverage, but external RP-SMA Wi-Fi antennas improve range in large buildings.
GNSS – Use an external puck antenna for reliable positioning and NTRIP applications.

IoT Antenna Considerations

IoT deployments differ from consumer setups. Industrial routers like the RUTM55 need:

Rugged antennas rated for outdoor use (UV-stable, IP-rated housings).
Omni vs directional – Omni antennas suit mobile or variable-signal sites, while directional panels are best where you know the mast location.
Embedded antennas may be used in compact enclosures, but performance will be reduced compared to external installs.

Correct antenna planning ensures you get the speed and resilience the router is capable of delivering.

Conclusion

The Teltonika RUTM55 is a flagship industrial 5G router that does far more than just provide bandwidth. With eSIM support, Dual-SIM failover, serial ports, I/O, and industrial protocol support, it bridges the gap between old and new, making it a perfect fit for SCADA, utilities, automation, and critical infrastructure.

Pair it with the right SIM strategy — whether eSIM for global flexibility, roaming SIMs for resilience, or private IoT SIMs for security — and install it with properly specified MIMO antennas, and the RUTM55 becomes a long-term, future-proof edge connectivity platform.