Siemens optiPoint 400 - Manual (Page 66)

Step by Step
Private Sphere/Security
66
Trace Call: Identifying Anonymous
Callers (Not for U.S.)
You can have the carrier identify malicious external call-
ers. You can save the caller’s station number during the
call or for 30 seconds after the call ends. However, it is
essential that you do not replace your handset during
this time.
Press the key. The LED lights up.
and
Select and confirm.
or
qlh
Enter the code.
Program/Service
* 84=Trace call?
After you have finished tracing the call, the data
is stored on the carrier’s system. Now contact
your service personnel.