Sony 500 用户手册

You can prevent your station number or name from ap-
pearing on the displays of external parties you call. The 
feature remains active until you deactivate it.

:

Open the idle menu 

Æ page 15.

Select and confirm the option shown.

:

Open the idle menu 

Æ page 15.

Select and confirm the option shown.

When configured (ask responsible service personnel), 
you can join in an on-going call conducted by an internal 
user and monitor silently and unnoticed.

)944

Enter the code.

j

Enter your internal station number.

Suppress number?

Transfer number?

Your service personnel can activate/deactivate 
caller ID suppression for all phones.