[Scantonic 9448+ all brands of sirens compatible?]

I’ve fitted a new Eaton branded Scantronic 9448+ wired panel that a customer supplied to replace the same old one that was 20+ years in service 

 

I’ve found the outdoor siren isn’t working at all and wondered if I can use any brand of wired siren or would this panel only work with selected compatible models? 

[RTU5024 GSM Gate Opener GSM Remote Switch]

Does anyone know how to test one of these? It’s brand new with a working SIM card from a previously same model but the SIM card holder was broken 

I’ve powered it up and it’s got mobile signal with a slow flashing red led and I’ve connected a 12V pc case fan into the following for testing the relay:

COM: Black negative wire to fan 
NC: Red positive wire to fan 

This was my thinking to prove that it can work with the existing magnetic gate 

I have the instructions which I will attach on here. It just doesn’t seem to respond to a request to turn the relay on so I think I need fo add my number as the authorised number or make it respond to any number using the relevant commands below 

Turn relay on 
1234#ON# 

Set authorised number (this is the one from the manual and looks like an extra digit in error?)
1234#TEL0044 13500001111#01

Setup allow all call in numbers to access it 
1234#AA#