Hello & Welcome to Just Answer,
Sorry to hear of the issue you are having with your phones.
May I ask:1) The Model Number of the phone system you are working with? That model should be printed on the bottom of the MAIN BASE UNIT of the system.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 (not part of the cordless system)?
4) WHEN was this issue first noticed?
I see it has been a few days and I just wanted to follow up to see if you have any more questions concerning this issue or if the issue was resolved.
I look forward to any further questions or results that you may have.
Thanks, ***** *****