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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. 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 ...
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 ]
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.
A public address system (or PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume (loudness) of a human voice, musical instrument, or other acoustic sound source or recorded sound or music.
A time of interval (TOI): the integer number of 18 second periods elapsed since the period represented by the current ITOW to the beginning of the next message. It has range 0 to 399 (inclusive) and requires 9 bits of data. TOI is the only content of subframe 1. The week number and ITOW are contained in subframe 2 along with other information.
Ringback number. A ringback number is a telephone number for a telephone line that automatically calls the line that the call was placed from, after the caller has hung up. The typical use of this facility is by telephone company technicians for testing a new installation or for trouble-shooting. [ 1]
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 ...