Hello & Welcome,
I'm Greg and will do my best to assist you today.
Sorry to hear of any issue you are having with your phones.
To help you with this issue, may I ask:
1) The FULL Model Number of the phone system you are working with? If this is a cordless system, that model should be printed on a sticker on the bottom or back of the main base unit.
2) What phone service provider (phone company) you have for this phone line?
3) If you have ANY other devices (phones, fax, alarm system, etc.) attached to this same phone line and if so, are they working properly?
OK - can you CONFIRM that the Alarm System is using the same phone line?
Also, do you have a DIFFERENT phone - such as a basic corded phone - that you can plug in to the phone jack here the main base unit is now connected?
The idea is to TEST - to see if this is a "phone" issue or a phone SERVICE issue.
You are quite welcome.
Please let me know if you have any other phone system questions or issues.
Thanks, ***** *****