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An automatic number announcement circuit ( ANAC) is a component of a central office of a telephone company that provides a service to installation and service technicians to determine the telephone number of a telephone line. The facility has a telephone number that may be called to listen to an automatic announcement that includes the caller's ...
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 ...
In Alberta, 311 was the automatic number announcement circuit (ANAC) until 1 April 2005 when this was changed to 958–6111 to make way for the 3-1-1 service. Since 2020, National 311 Day has been an event held on March 11 (3/11) to spread awareness about 3-1-1 systems [ 5 ] [ 6 ]
1. International access. 011. List of dialing codes. The North American Numbering Plan ( NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the telephone country code 1. Some North American countries, most notably ...
Automatic number announcement circuit, a machine which announces the caller's number [2] Loop around , a primitive conference call bridge [ 3 ] Milliwatt test , a standardized 1004 Hz, zero dBm sinusoidal test tone used to measure line quality and transmission loss between stations.
Loop around. A loop line or loop around is a telephone company test circuit. The circuit has two associated phone numbers. When one side of the loop is called (side A), the caller receives a test tone of approximately 1000 Hz ( milliwatt test ). When the second number (side B) is called, it produces dead silence, but the party on side A hears ...
A telephone number serves as an address for switching telephone calls using a system of destination code routing. [ 1] Telephone numbers are entered or dialed by a calling party on the originating telephone set, which transmits the sequence of digits in the process of signaling to a telephone exchange. The exchange completes the call either to ...
In North America, exchanges 958 and 959 are normally reserved for local and long-distance test numbers (such as automatic number announcement circuits). A rare few areas (such as area code 204 in Manitoba) reserve 959 only. 950-xxxx are reserved as local access numbers for feature group "B" alternate long-distance carriers.