Slippers
If it happens again, suggest to the Planner that he flicks the little silver toggle switch down by his headset socket.
It was probably a grey-haired ex-Crew Chief you were dealing with who still had the toggle selected to the handset rather than headset. The ex-Crew Chiefs bring plenty of great qualities such as guidance and leadership to the sector team but possibly not so good at complex operations such as flicking switches <img src="wink.gif" border="0">