If you have a telephone with Caller ID display capacity, or an adjunct unit, Caller ID shows you the name and number of the person who is calling on the screen before you answer the phone, so you can choose which calls to pick up and which to return at a more convenient time.
Restrictions and Requirements
Caller ID requires display equipment. The name and number displayed are those associated with the line from which the call is made. It may not be available in all areas or on all calls and may not be available internationally. Some calls may be blocked by the calling parties and some names and numbers may not be available.