Company general manager Ardyth Williams said the move to the automatic number identification system was necessary to keep up with the areas around the North Norwich system.
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"' Automatic number identification "'( "'ANI "') is a feature of a telecommunications network for automatically determining the origination telephone number on toll calls for billing purposes.
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However, these do not provide complete protection : harassers can use payphones and, in some cases, caller ID ( but not necessarily automatic number identification itself ) can be spoofed or blocked.
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Toll free numbers usually capture the telephone number of the caller for billing purposes through automatic number identification, which is independent of caller ID data and functions even if caller ID is blocked.
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Primary telephone service providers are offering information services such as automatic number identification, which is a telephone service architecture that separates CTI services from call switching and will make it easier to add new services.
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Automatic number announcement systems are based on automatic number identification, and meant for phone company technicians, the ANAC system works with unlisted numbers, numbers with caller ID blocking, and numbers with no outgoing calls allowed.
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Even where end-user Caller ID is not available, calls are still logged, both in billing records at the originating telco and via automatic number identification, so the perpetrator's phone number can still be discovered in many cases.
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When you call an 800 number, for instance, the party receiving your call gets your phone number through automatic number identification and can use a reverse directory to get your address and put you on a mailing list.
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This system, similar but distinct from the panel call indicator of the 1920s and automatic number identification of the 1940s, which communicated telephone numbers to machines, was the predecessor to what is now caller ID, which communicates numbers to people.
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However, this does not provide complete protection : harassers can use payphones, in some cases, automatic number identification itself can be spoofed or blocked, and mobile telephone abusers can ( at some cost ) use " throwaway " phones or SIMs.
