Harold1066

Thanks everybody for your assistance - I have identified a way forward now. Thank you all for your help.

Thanks Al-yeti It worked fairly reliably - it just stopped working when we changed telephone supplier - but maybe it was switched off at the same time as our switch. I think as an interim we would use an open tap system - my google search didn't come up with anything other thab a brewery! What does TAP stand for?

Odd that it was working in March 2020 then.

Hi al-yeti. Number called by the Alarm is 07785499993. Old supplier Global 4 - new supplier BT - Worked OK up to switchover. I would have thought it unlikely that the number was disabled on the same day that we switched - especially since I can still ring it and get an answer from my mobile. Thanks

Hello I help look after an alarm system in a community hall. This has a euro meridian system with a dialler module which sends a text to a couple of nominated numbers if the alarm is triggered. The alarm dials out to what I understand is a message centre. The problem is that we have recently changed our telecoms supplier and I am now seeing a 'Data Comms Error' which suggests that the alarm is unable to contact the messaging centre. I attempted to call this number from my home phone which give a number unobtainable tone. However if I call the access number from my mobile the phone answers and I hear a 'carrier'. It would seem that the access number has been blocked by my telecomms supplier. Does it seem likely that the number is blocked somehow on our landline? Why would this be? How would I go about having it unblocked?