(CLID) Calling Line ID- Information about the billing telephone number from which a call originated. The CLID might be the entire phone number, the area code, or the area code plus the local exchange (NPX).
(CLID) Calling Line ID- Information about the billing telephone number from which a call originated. The CLID might be the entire phone number, the area code, or the area code plus the local exchange (NPX).