Landline- Beeping/ lost connection every 2 seconds

[custe7]

While on call there is a beeping noise much like the noise heard with call waiting.  This happens steadily every 1-2 seconds for the whole call.   I can hear it but the person I am talking to can not.  With every beep I loose that part of the conversation.  This has happened to me before and resolved on its own.  Very frustrating.  Please help.  Thanks.