Some OmniTouch 4135 IP have a different keypad with other symbols. This does not affect the 
functions of the buttons
2
DESCRIPTION
SD memory card port
Expansion 
microphone 
port
Display screenSpeaker Microphone Keypad
Power supply port
Security lock 
port
AUX port
Network cable port
Expansion microphone port
LEDs 
Flashing blue  Incoming call
Steady blue light  Call in progress
Flashing red   On hold,  
microphone and  
speakers turned 
off
Steady red light  Mute,  
microphone 
turned off
Alphanumeric keys, phone book
MENU  
settings menu
UP ARROW 
navigation in menus, 
display of call list
C 
no/end/back, 
recording
Increase volume
Decrease volume
Mute
HOLD
OK 
yes/conrm choice
Answer/connect 
new line
Hang up/end line
CONFERENCE
Automatic dialling 
of conference 
groups
CONTACTS  
phonebook
DOWN ARROW 
navigation in menus, 
display of call list
Maintenance
Clean the equipment 
with a soft, dry cloth. 
Never use liquids.