Sony CMD-C1 Operating Instructions Manual page 16

During a Call (Continued)
One active call (or one call on hold) and one call waiting
When your CMD-C1 alerts you (beep) that a call is waiting, there are
several options available.
1 The display automatically offers you call
2 Select Swap to put the active call on hold
MENU
Swap to alternate between the active call and the call on hold.
Replace to end the active call and retrieve the call waiting.
Busy to indicate to the calling party that your line is engaged.
End All Calls to end all established calls and accept the call waiting.
Mic Off/Mic On to mute/unmute the microphone.
Note
In step 1 select Busy to indicate to the calling party that your line is engaged.
One active call, one call on hold and one call waiting
If you already have two calls (one active and one on hold) and you receive
another call (call waiting), proceed as follows:
1 The display automatically offers you call
2 Select Busy to indicate to the calling party
GB
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waiting options.
and connect the waiting call.
or
Press and select one of the following
MENU
options:
waiting options.
that your line is engaged.
or
Select Replace from the menu for the
options: Replace, Busy, End All Calls, Mic
On/Mic Off.