Teltonika FMM125 — LTE-M Professional Tracker with RS232 and RS485

The Teltonika FMM125 is an LTE-M professional tracker for fleet projects that need GNSS tracking, Bluetooth and RS232/RS485 serial interfaces.

It is suited to integrations where peripheral connectivity, serial data or external devices are part of the telematics design.

Tracking Hardware UK supplies FMM125 for B2B projects and can help confirm interface requirements, carrier support and delivered quote.

Key Specifications and Deployment Notes

• Connectivity: LTE-M / Cat M1 family with GNSS positioning; regional support depends on order code and carrier

• Interfaces: RS232 and RS485 for professional integrations

• Bluetooth: Bluetooth support for compatible accessories and configuration workflows

• Installation: hardwired vehicle tracker for fleet and specialist equipment applications

• Use cases: advanced fleet telematics, sensors, external devices, logistics and specialist integrations

• Deployment note: confirm carrier support, RS232/RS485 requirements, SIM/APN, wiring and platform support

Frequently Asked Questions

What is Teltonika FMM125 used for?

FMM125 is used for LTE-M fleet tracking projects that need professional serial interfaces such as RS232 and RS485.

Is FMM125 a 4G LTE Cat 1 tracker?

No. It belongs to the LTE-M / Cat M1 family. Compare FMC125 when LTE Cat 1 is required.

Why choose FMM125 instead of a basic tracker?

Choose FMM125 when the project needs serial interfaces, peripheral integration or more advanced installation requirements.

What should be checked before ordering FMM125?

Check carrier support, RS232/RS485 requirements, wiring, SIM/APN, platform support and accessories.

Can Tracking Hardware UK quote FMM125 in volume?

Yes. We support B2B quotes for installers, TSPs, resellers and fleet operators.

Which accessories can I connect to the FMM125?

The FMM125 has RS232 and RS485 interfaces for professional integrations, as listed in the Teltonika datasheet, plus Bluetooth for compatible accessories. Accessory compatibility depends on the exact device and configuration, so send us the proposed setup and we will confirm it.

Product Documentation

Official Teltonika Wiki and downloads: https://wiki.teltonika-gps.com/view/FMM125