XDMA6540 OPERATION
Bluetooth® Operation
During a Phone Call
Volume
Microphone Mute
Audio Transfer
Call Waiting
Call Hold
Turn the volume knob to adjust the volume level during a phone call. Bluetooth mode has a separate volume level from the main volume of other modes. The XDMA6540 will remember the volume level in Bluetooth mode and always return to the last volume level for each phone call.
Press MUTE during a phone call to turn the XDMA6540's external microphone off. Press MUTE again to resume microphone operation.
Press DISP during a phone call to transfer the call from the XDMA6540 to the cell phone. Press DISP again to toggle the audio back to the XDMA6540.
During a phone call, if there is a second incoming call, press 
to place the first call on hold and switch to the second
phone call. Press 
again to switch back to the first call.
During a phone call, when there are no additional incoming calls, press 
to place the call on hold. Press 
again to resume the phone call.
Note: Audio transfer, call waiting and call hold must be supported by the mobile phone and service provider to function properly.
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