Avaya 4621SW 사용자 설명서

Your phone interacts with several system hardware devices and system software. This screen 
provides information about three of the main interfaces.

Three miscellaneous status screens provide additional information about your telephone and its 
connections, such as the model, serial number, and MAC address. 

On first-time startup, your 4620/4620SW/4621SW IP Telephone’s display area contrast is set to 
a mid-level. To adjust it to better suit your work environment and lighting, 15 contrast levels are 
available. 

Note:

If you have an EU24/EU24BL Expansion Module attached to your phone, you 
can also adjust its contrast with this option.

You might not be able to distinguish between all 15 contrast level settings. Some 
of the upper and/or some of the lower contrast level settings might appear 
identical to adjacent settings. This is normal.

1. Select the Contrast Control option from the Options Main screen (accessed by pressing 

the phone’s Option button).

2. If you do not have an EU24/EU24BL installed, press the Line/Feature button on either side 

of the display line on which you see 4620. Doing so identifies that you want to adjust the 
telephone’s display contrast.

If you have an EU24/EU24BL attached to your phone, press the Line/Feature button on 
either side of the display line on which you see EU24. Doing so identifies that you want to 
adjust the Expansion Module’s display contrast. 

3. To brighten the contrast, press the Right Arrow softkey until you reach the desired contrast 

level. To dim the contrast, press the Left Arrow softkey until you reach the desired contrast 
level. 

Each softkey press results in the level being increased or decreased, depending on which 
arrow softkey you press. Chevron symbols provide visual confirmation of the current level.