Siemens 500 advance User Manual

Page of 116
Telephone Settings
53
Step by Step
Locking the Telephone to Prevent 
Unauthorized Use
You can prevent unauthorized persons from using your 
telephone and its electronic notebook during your ab-
sence.
Precondition: You must have configured a personal 
identification number (PIN) for your telephone 
To lock and unlock the telephone:
Select and confirm.
or
or
F??
 or 
G??
Enter the code for "on" or "off".
D
Enter the telephone lock PIN 
Changeover on?
Changeover off?
While the telephone is locked, a special dial tone 
sounds when you lift the handset. You can con-
tinue to dial internal numbers as usual.
Your telephone can also be locked or unlocked 
again by an authorized part