10.35.1. Feature Description 
The "Malicious Call Identification" feature can be used to trace or
identify the A-station's call number in a OpenScape 4000/HiPath
4000 network, even if the number is marked as private.
If tracing is performed, the A-station's call number is output
as a system message at the operating terminal, for example, and not on
the B-station's display.
You can also use this function to identify external callers if MCID
evaluation is activated by the carrier and protocol element transfer
is guaranteed for MCID.