10
ADJUSTING THE SPEAKER VOLUME
  Adjust the speaker volume using the buttons   and  . 
PLACING CALLS ON TEMPORARY HOLD
Mute
 Press   (Mute) to turn off the microphone. 
The LEDs change from blue to red. The other party cannot hear what you are saying. 
 Press   (Mute) to reconnect the call.
Hold
 Press   (Hold) to put the call on hold. 
The LEDs change from blue to ashing red. Both the microphone and the speaker are turned off 
and the call is on hold. 
 Press   (Hold) to reconnect the call.
ENDING CALLS
  End the call by pressing   .
SECURE CONNECTION
The OmniTouch 4135 IP supports secure data connections between devices (authenti-
cation and encryption). This feature must be activated by the administrator. 
You know the feature is activated if you see a closed padlock in the lower right-hand 
corner of the display screen when the OmniTouch 4135 IP has a secure connection to 
the other phone. If the phone or PBX you are calling does not support secure connec-
tions, you will see an open padlock on the screen. See the illustration on page 5.
DURING A CALL