Caller ID - Know Who is Calling Before You Pick Up

A feature most of us can't live without is caller ID. Caller ID shows who is calling, which comes in handy when you are very busy and just don't have time to talk to your long-winded Aunt Ethel.

Caller ID, often referred to as CID or CNID, is part of the intelligent network for traditional telephone companies and is carried in the packet headers for VoIP services.

Caller ID is still not available in many areas when receiving or making an international call, however, this is rapidly changing.