Hello & Welcome to Just Answer,
Sorry I didn't see your question earlier and to hear of the issue you are having with your phones.
May I ask:
1) What phone service provider (phone company) you have for this phone line?2) If you have ANY other devices (phones, fax, alarm system, etc.) attached to this same phone line (not part of the cordless system)?
3) When this issue first began?
4) Can you still make outgoing calls?
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, ***** *****