Tele-Communication (Telecom) Terms Glossary and Dictionary
CLID: Calling Line Identification
Calling Line Identification (CLID), also known as Caller ID, refers to the following definitions in the telecommunications system: 1. A service available on digital phone networks that tells the person being called which number is calling them. The central office equipment identifies the phone number of the caller, enabling information about the caller to be sent along with the call itself. Synonymous with ANI (Automatic Number Identification). 2. A facility provided by a switched network which can notify a called terminal of the telephone number of the line from which a call originated.