Having a annoying problem here....

When someone does a station to station intercom call using * and then the extension, after the calling party hangs up, the destination phone will ring 3 times.

Example: Extension 19 calls extension 11 by dialing *11 or by pressing a programmed button. After extension 19 hangs up, extension 11 then rings 3 times with 2 short beeps between each ring.

Anyone know how to stop this?

Tell them to press Intercom before pressing the button that calls the other extension.

The phones are programmed to automatically select an outside line when you lift the handset. So when you press the button for the other extension, the system thinks that you are on an active call, and want to transfer it to the other party. When you hang up from the internal call, the transfer completes, and thus the ring-beep-beep.

Thanks! that was indeed the problem...

Only 2 extensions showed this behavoir, and both of those extensions are the only ones set auto select a line. The rest all select Intercom first...