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2G · Dual SIMDual SIMRS232/RS485External Antenna1-Wire

Teltonika FMB125

Professional wired tracker with dual SIM, RS232/RS485 interfaces, and external GNSS antenna support. Built for demanding fleet deployments and sensor-rich applications.

Teltonika FMB125

Technical Specifications

GNSSGPS, GLONASS, BeiDou, Galileo, QZSS — <3 m accuracy
Network2G GSM Quad-band, Dual SIM
InterfacesRS232, RS485, 1-Wire, 1 DIN, 1 Analog In, 1 DOUT, Micro-USB
Input Voltage10 – 30 V DC
Backup Battery170 mAh
Memory128 MB
Bluetooth4.0 LE
Dimensions65 × 56.6 × 20.6 mm
GNSS AntennaExternal (SMA connector)
CAN SupportVia external adapter

Key Features

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Dual SIM for seamless network roaming across East Africa
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RS232 & RS485 for fuel sensors, RFID readers, Garmin navigation
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1-Wire interface for temperature probes and iButton driver ID
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External GNSS antenna for better reception inside metal cabins
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Driver behaviour, eco-driving and crash detection
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Geofencing, overspeed alerts, and scheduled reporting
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Supports Bluetooth sensors for wireless peripherals

Ideal Use Cases

Long-haul Trucks

Long-haul Trucks

Dual SIM ensures connectivity across Kenya, Uganda, Tanzania border routes.

Refrigerated Transport

Refrigerated Transport

1-Wire temperature monitoring for cold-chain compliance.

Fuel Monitoring Fleets

Fuel Monitoring Fleets

RS232 connects directly to capacitive or ultrasonic fuel sensors.

Construction & Mining

Construction & Mining

Robust I/O suite connects to equipment sensors and door contacts.