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1.20 Integrated Services Digital Network (ISDN) Service Features
186 Feature Guide
1.20.1.2 Calling/Connected Line Identification Presentation
(CLIP/COLP)
Description
Calling Line Identification Presentation (CLIP):
The PBX can send a preprogrammed telephone number to the network when an extension
user makes a call. The called party can see the number on his telephone display before
answering the call.
Connected Line Identification Presentation (COLP):
The PBX sends a preprogrammed telephone number to the network when the extension user
answers an incoming call. The caller can see the number of the answering party on his
telephone display when the call is answered.
These features comply with the following European Telecommunication Standard (ETS)
specifications:
ETS 300 092 Calling Line Identification Presentation (CLIP) supplementary service.
ETS 300 097 Connected Line Identification Presentation (COLP) supplementary service.
[CLIP Example]
[COLP Example]
ISDN
1) Dials
"87654321".
Called party
(CLIP/COLP No.: 87654321)
Caller
(CLIP/COLP No.: 12345678)
2) "12345678"
is displayed.
PBX
PBX
ISDN
FWD, IRNA, etc.
1) Dials
"111222333".
2) Answers the call.
3) "111222444"
is displayed.
Caller
Called party
(CLIP/COLP No.:
111222333)
Answering party
(CLIP/COLP No.:
111222444)