switel DE18 Série Mode D'emploi page 138

Telephoning
Setting the receiver volume
The volume can be adjusted to one of 5 settings during a call.
- or .
Talk time display
The duration of a call is displayed in minutes and seconds during the call.
Muting the microphone in the handset
The microphone in the handset can be activated and deactivated during a telephone
conversation.
C
C
138
61
Select the required volume
62
Deactivate the microphone (muting function
on)
Activate the microphone