MTM GSM Kit SIM installation guide

Which SIM does the CAME/BPT MTM GSM take?

A micro SIM (3FF). Not the standard size the older Videx units take, not nano. Registered and active before it goes in the panel — the MTM won't walk you through activation.

Which network?

The MTM GSM is a 2G device, so the question is really: which networks still run 2G at your gate? That list is shrinking, and it varies by area. The practical answer is to test first: compare Vodafone, O2 and EE at the panel and order the SIM on the strongest, rather than discovering the problem after the panel is mounted.

Cap the spend on any pay-monthly SIM before it goes live.

Fitting the SIM

For the installing engineer, power off:

1. Open the panel and locate the SIM holder on the GSM module.
2. Seat the micro SIM in the holder — one way only — and lock it.
3. Check the module is seated firmly in the MTM frame while you're in there. A half-seated module produces convincing fake faults.
4. Antenna connected before power-up.

First power-up

Allow the module time to register — the status LED settles when it's on network. Then program at least one call number by SMS and make a test call from the button.

If it won't connect

• Never registers: confirm 2G coverage actually exists at the gate. Test the SIM in an old 2G-capable phone at the panel position.
• Registers then drops: marginal signal. Move the antenna up and away from the panel's own metalwork.
• Commands ignored: PIN lock off, SMS centre number present, command syntax exact.

FAQ

Is the MTM GSM still worth fitting? For an existing stock unit on a site with solid 2G, it'll serve. For new supply, CAME's 4G LTE range is the safer decade.

What happens when 2G is switched off? The panel loses service — it has no 4G hardware. Plan the upgrade before the switch-off reaches your area.

Does CAME supply the SIM? No. Supplied separately, like every GSM intercom.