So we recently bought a house and it had an ADT alarm system installed. Thought it was pretty ridiculous to take a 3 year $50/month subscription so didn’t take that, but we do engage the alarm when we leave the house and sometimes use the feature to notify us of what doors are opening. We do not have any phone line anymore, but somehow only since 2 weeks every Thursday morning at around 1 am the alarm give a “phone failure error”. Fun thing is, one of the units is in our bedroom so we are wide awake then.

Now I tried to do some searching, but no success. Just want to check with you here, is there any way to keep using the alarm but switch off the fact that the system is trying to connect via the phone line, so that we could still use the system just without the connection to the emergency services? I do not have an installer code, only the regular alarm code.

The units or system we have is a GE Concord 4. Please let me know if pictures would help more.