Avaya 555-233-128 Manuel D’Utilisation

Use this procedure to adjust the contrast setting on any telephone with a display. 

1. While the telephone is on-hook and idle, press the following sequence of keys on the 

telephone’s faceplate:

Mute 2 6 6 8 # (Mute C O N T #) 

Note:

Press the Mute button momentarily. Do not press this button while pressing other 
keys/buttons. The 4630/4630SW IP Telephones and the 4690 IP Conference 
Telephone do not have a dedicated Hold button. For all other 4600 Series IP 
Telephones, pressing the Hold button instead of the Mute button also works.

All IP telephones except those without displays present the following text left-justified at the 
top of the display:

where the number of chevrons (“>” characters) corresponds to the value of the 
NVCONTRAST system variable.

2. To lower the contrast, press *. To increase the contrast, press 0.

If the contrast is already at the lowest or highest value when an asterisk or zero value is 
selected, an error tone sounds. If a value different from the current value of NVCONTRAST 
is entered, the display updates immediately and the number of chevrons change 
accordingly. 

3. Repeat Step 2 as needed until the desired contrast is reached. When the contrast is at the 

desired level, press #.

If selected contrast is equal to the NVCONTRAST value, the procedure terminates. If a new 
value was selected the following left-justified text displays:

4. Press the * button to terminate the procedure, or the # button to save the new value. If you 

press the # button, all IP telephones except the 4601 display the following text:

All phones save the new value.

>>>>>>>>
*=

 - 0=+ #=OK