Mechanism to support multiple versions of toll free service

Telephonic communications – Special services – Reserved call

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Details

379207, 379220, H04M 342

Patent

active

060581778

ABSTRACT:
An apparatus for selecting telephone service types on a subscriber line in response to a called number of a telephone call on the subscriber line, the called number including a number plan area code and a central office code. The apparatus includes a service switching point having subscriber line termination equipment for terminating the subscriber telephone line. The subscriber line termination equipment has a called number buffer for receiving and storing a called telephone number from the subscriber telephone line in response to the telephone call on the subscriber telephone line. The apparatus further includes a processor in communication with the called number buffer and programmed to read the numbering plan area code from the called number buffer and to determine whether or not the numbering plan area code meets a first criteria, to process the call according to a first call model associated with a first telephone service type, when the numbering plan area code meets the first criteria, to terminate processing according to the first call model when at least a portion of the numbering plan area code and at least a portion of the central office code of the called number meet a second criteria, to assign a dummy routing code to the call, the dummy routing code being operable to control call processing under a second call model associated with a second telephone service type, and to process the call according to the second call model.

REFERENCES:
patent: 4924510 (1990-05-01), Le
patent: 5905505 (1992-03-01), Finucane et al.
patent: 5937053 (1999-08-01), Lee et al.
"Switching and Signaling Generic Requirements for Toll-Free Service Using AIN" GR-2892-CORE Bellcore (1995).
"AINGR: Switching Systems Section 1-8" GR-1298-CORE Bellcore (1996).
"Technical Reference Notice of Disclaimer" TR-NWT-000533 (1995).
"AIN 0.1 SSP Functions" TR-NWT-001284 (1992).

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