Originally Posted by Bushmills
Hopping on the old post. The guide above links to an instruction set for a cisco phone...

Anyway. The APU 72 along with the CS540 does work with the 5343 and the 6011/6021. Two things you need to do with them though is, in the settings, enable the headset hardware key and also set the headset mode to EHS.

Then you should be good to go.

-B

You answered a 2 year old post. Lol