Automatic route selection of a private telephone network path on the basis of a public telephone network number
April 28, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesData base auto bill calling using CCIS direct signaling Finite storage-time queue Arrangement for translating telephone station equipment numbers into directory numbers Distributed CBX system employing packet network Telephone toll call security and logging device and method Method of providing virtual private network telephone service Methods of establishing a switching connection within a switching system Network control center call trace Method of and system for limiting access to a group of telephone trunks Telephone interexchange call routing InventorsAssigneeApplicationNo. 06/600148 filed on 04/13/1984US Classes:379/198, PBX379/207.13, Party identification or validation (e.g., personal identification number (PIN))379/225, Multi-PBX interconnection379/903PASSWORDExaminersPrimary: Brown, Thomas W.Attorney, Agent or FirmInternational ClassesH04Q 3/62 (20060101)H04M 3/38 (20060101) AbstractA data structure and program routines for use in a private branch exchange telephone system (PBX) for automatically routing calls via a private telephone network in response to a dialed public telephone network number and for restricting outgoing calls from the PBX to specific public network telephone stations. In a large corporate PBX switching network interconnected by both a public telephone network and a private telephone network, a telephone set connected to one PBX system establishes a switch connection through the private network by dialing the public telephone network's number for a destination telephone set connected to another PBX system. In response to the dialed number, the first PBX system automatically determines that the destination telephone set can be reached via the private telephone network and automatically converts the dialed public telephone network number to a private telephone network number designating the destination telephone set. The data structure allows access by PBX telephone sets to designated groups of telephone stations or specific individual telephone stations connected to the public telephone network to be restricted. In addition, if a PBX telephone set attempts to dial a restricted public telephone network station, the system first verifies that the dialed station is restricted to that particular PBX telephone set and then provides a procedure whereby the telephone user can enter a personal authorization code to enable the user to complete the call.Other References
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