Siemens Gigaset CX203isdn Owner's Manual page 148

Capture
Performance feature "Identify/capture". MCID stands for "Malicious Call
Identification". If you receive annoying calls, you can have the telephone exchange
store the caller number. This performance feature must be requested from the
network provider.
CCBS (Completion of Calls to Busy Subscriber)
See "Callback on busy"
CCNR (Completion of Calls No Reply)
See "Callback on no answer"
CD (Call Deflection)
See "Call forwarding during the call phase"
CF (Call Forwarding)
See "Call diversion".
Channel
Like an analogue connection, an ISDN connection enters the building through two
cables, but for ISDN a distinction is made between the two bearer channels called
the B-channels (which have nothing to do with the physical cables!) and the control
channel, otherwise known as the D channel.
Charge detail display
See "AOC-D" and "AOC-E".
CLI (Calling Line Identification)
The caller's phone number is transmitted.
CLIP (Calling Line Identification Presentation)
User A calls User B. A's phone number appears on B's telephone screen.
CLIR (Calling Line Identification Restriction)
Stops your personal phone number being displayed.
CNIP (Calling Name Identification Presentation)
User A calls User B. A's name appears on B's telephone screen.
Glossary
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