Hello & Welcome to Just Answer,
Sorry to hear of the issue you are having with your phones.
To help you with this issue, may I ask:
1) What phone service provider (phone company) you have for this phone line?2) Can you still make OUTGOING CALLS with this system?
3) Did the provider come to your home to install this new box?
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, ***** *****--. .-(im)