Hello & Welcome to Just Answer,
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?
2) What phone service provider (phone company) you have for this phone line?
3) WHEN was this issue first noticed, or reported to you?
4) Has anyone mentioned what they HEAR when trying to call you? Examples would be BUSY, Endless ringing, calls switching to some message system, etc.
Please REPLY using the box below.