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CS AASTRA 6731i IP PHONE USER GUIDE V3.2.2  AASTRA – 2817-002 
CLEARSPAN® IS A RGISTERED TRADEMARK OF AASTRA TECHNOLOGIES LTD.  PAGE 27 OF 82 
3.11  Call Timer 
This timer displays the elapsed time of a call. 
3.12  Mute 
You can use the Mute key in any audio mode. 
 
Activate the Mute feature: 
During a call: 
Press the Mute key. 
CAUTION! 
If you place a muted call on hold, the 
phone automatically takes the call off 
mute when you reconnect to the call. 
  The red Mute lamp flashes slowly. 
  The microphone icon   displays 
on the screen. 
  You can hear the caller. 
  The caller cannot hear you. 
Deactivate the Mute feature: 
Press the Mute key again.