When a call comes in OR when the handset or line button is pushed to make or answer a call, what appears to be the signal comes in and out. The display flashes and we can't hear anything while the display is off. The call never disconnects and if we're quick we can get the incoming number off caller id so we can call back on our cells. PLEASE HELP ME BEFORE THIS THING LEARNS HOW TO FLY (out the back door!)

Lands Phones - Avaya - Partner Telset 18B Corded Phone