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  2. Caller ID - Wikipedia

    en.wikipedia.org/wiki/Caller_ID

    Caller-ID system response sounds in various cases: analog, ISDN and digital PBX Caller identification (Caller ID) is a telephone service, available in analog and digital telephone systems, including voice over IP (VoIP), that transmits a caller's telephone number to the called party's telephone equipment when the call is being set up.

  3. Ringback number - Wikipedia

    en.wikipedia.org/wiki/Ringback_number

    Ringback testing is an acceptance testing procedure conducted by telephone installers to verify the quality of customer premises wiring to prevent network damage from faulty equipment or installation. The test consists of calling a reverting calling telephone number (ringback number) or a vertical service code with a standard

  4. Automatic number announcement circuit - Wikipedia

    en.wikipedia.org/wiki/Automatic_number...

    Automatic number announcement systems are based on automatic number identification. They are intended for use by phone company technicians, the ANAC system bypasses customer features, such as unlisted numbers, caller ID blocking, and outgoing call blocking. Installers of multi-line business services where outgoing calls from all lines display ...

  5. Automatic number identification - Wikipedia

    en.wikipedia.org/.../Automatic_number_identification

    Automatic number identification (ANI) [1] [2] is a feature of a telecommunications network for automatically determining the origination telephone number on toll calls for billing purposes. Automatic number identification was originally created by the American Telephone and Telegraph Company (AT&T) for long distance service in the Bell System ...

  6. Plant test number - Wikipedia

    en.wikipedia.org/wiki/Plant_test_number

    The specifications define several test features for line conditions, such as quiet line and busy line, and test tones transmitted to callers. The tests available for plant testing include Automatic number announcement circuit, a machine which announces the caller's number [2] Loop around, a primitive conference call bridge [3]

  7. Calling Name Presentation - Wikipedia

    en.wikipedia.org/wiki/Calling_Name_Presentation

    In the US, the caller's name, or CNAM information, is not sent during a call. Rather, the terminating carrier is responsible for providing the Caller ID information to its customer. The terminating carrier performs a database lookup using the caller's phone number to obtain the name information to display with Caller ID.

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