CALLING LINE IDENTITY
These days the telephone number of the caller travels ahead of most calls. This is known as Calling Line Identity (CLI) or by BT as Caller ID. You will probably most often Please Also See this when someone calls your mobile phone. This is also known in the United States as Automatic Number Identification or ANI. This number can be used by CTI software to match up to a computer record for that caller. This, essentially, is caller ID, which delineates a caller’s information on the telephone or on a separately attached screen. Also See automatic number identification.