Abbreviated dialing using a voip platform

Abstract

A feature server provides an abbreviated dialing feature via an internet protocol based network to facilitate abbreviated dialing between a first phone system that serves a first location and a second phone system that serves a second location. A routing table at the first phone system stores a number range of a voice over internet protocol customer local area network located at a third location. The routing table includes instructions to route abbreviated-dialed calls to a first integrated access device. The feature server receives a query from the second phone system when an abbreviated-dialed call originating from the second phone system is not recognized by the second phone system. The abbreviated-dialed call is communicated to the internet protocol based network by a second integrated access device.

1 . A system, comprising:
 a feature server that provides an abbreviated dialing feature via an internet protocol based network to facilitate abbreviated dialing between a first phone system that serves a first location and a second phone system that serves a second location, the second phone system including a telephone switch having a customized dialing plan trigger to trigger a query to the feature server when an abbreviated-dialed call originated using the second phone system is not recognized by the telephone switch,   wherein the first phone system includes a first routing table that stores a number range of the second phone system, the first routing table including first instructions to route abbreviated-dialed calls to a first integrated access device, wherein the first routing table stores a number range of a voice over internet protocol local area network located at a third location,   wherein the query from the telephone switch is processed at a network element that includes a second routing table that stores a number range of the voice over internet protocol local area network, the second routing table including second instructions to direct the telephone switch to route abbreviated-dialed calls to a second integrated access device located at the second location, and   wherein the abbreviated-dialed call is communicated to the internet protocol based network by the second integrated access device.   
   
   
       2 . The system of  claim 1 , wherein the first phone system is located at the first location. 
   
   
       3 . The system of  claim 1 , wherein the first integrated access device is located at the first location to provide the first phone system access to the internet protocol based network. 
   
   
       4 . The system of  claim 3 , wherein the first integrated access device interfaces to the first phone system via a primary rate interface facility. 
   
   
       5 . The system of  claim 1 , wherein the second integrated access device is located at the second location to provide the second phone system access to the internet protocol network. 
   
   
       6 . The system of  claim 5 , wherein the second integrated access device interfaces to the second phone system via a primary rate interface facility. 
   
   
       7 . The system of  claim 1 , wherein the abbreviated dialing feature enables abbreviated dialing between the first phone system at the first location and the voice over internet protocol local area network at the third location. 
   
   
       8 . The system of  claim 1 , wherein the abbreviated dialing feature enables abbreviated dialing between the second phone system at the second location and the voice over internet protocol local area network at the third location. 
   
   
       9 . The system of  claim 1 , wherein the first phone system is one of a private branch exchange phone system and a centrex phone system. 
   
   
       10 . The system of  claim 1 , wherein the second phone system is one of a private branch exchange phone system and a centrex phone system. 
   
   
       11 . The system of  claim 10 , wherein the feature server stores number ranges for the private branch exchange phone system and for the centrex phone system to enable the abbreviated dialing feature. 
   
   
       12 . A computer implemented method, comprising:
 providing an abbreviated dialing feature over an internet protocol network to enable abbreviated dialing between a first phone system that serves a first location and a second phone system that serves a second location;   storing, in a first routing table at the first phone system, a number range of the second phone system, the first routing table including first instructions to route abbreviated-dialed calls to a first integrated access device at the first location, wherein the first integrated access device provides the first phone system access to the internet protocol network;   triggering a query to a service control point in response to an abbreviated-dialed call that originated from the second phone system and is unrecognized by a central office switch that provides a centrex group to the second location;   providing a routing instruction to direct the central office switch to route the abbreviated-dialed call to a primary rate interface facility that is part of the centrex group of the central office switch, the routing instruction determined based on a second routing table stored at the service control point;   accessing the internet protocol network via the first phone system using the first integrated access device at the first location, wherein the first integrated access device interfaces to the first phone system via the primary rate facility;   accessing the internet protocol network via the centrex group using a second integrated access device that interfaces to a second primary rate interface facility that is part of the centrex group at the central office switch, wherein the second integrated access device is located at the second location; and   storing, in the first routing table of the first phone system, a number range of a voice over internet protocol local area network located at a third location, the first routing table including instructions to route abbreviated-dialed calls to the first integrated access device, wherein the first integrated access device provides the voice over internet protocol local area network access to the first phone system.   
   
   
       13 . The computer implemented method of  claim 12 , further comprising communicating the abbreviated-dialed call to the internet protocol network via a second integrated access device at the second location that is interfaced to the primary rate interface facility. 
   
   
       14 . The computer implemented method of  claim 12 , wherein the first phone system is one of a private branch exchange phone system and a centrex phone system. 
   
   
       15 . The computer implemented method of  claim 12 , further comprising storing, in the second routing table, a number range of the voice over internet protocol local area network, the second routing table including second instructions to direct the central office switch to route the abbreviated-dialed call to the primary rate facility interfaced to the second integrated access device. 
   
   
       16 . The computer implemented method of  claim 12 , further comprising storing number ranges for the first phone system and the centrex group at a voice over internet protocol feature server. 
   
   
       17 . The computer implemented method of  claim 12 , wherein the abbreviated dialing feature enables abbreviated dialing between the first location and the voice over internet protocol local area network at the third location and between the second location and the voice over internet protocol local area network at the third location. 
   
   
       18 . A feature server, comprising:
 a processor; and   a memory including operational instructions that are executable by the processor to:
 provide an abbreviated dialing feature via an internet protocol based network to facilitate abbreviated dialing between a first phone system that serves a first location and a second phone system that serves a second location, 
 wherein a routing table at the first phone system stores a number range of a voice over internet protocol local area network located at a third location, the routing table including instructions to route abbreviated-dialed calls to a first integrated access device; 
 receive a query from the second phone system when an abbreviated-dialed outgoing call is not recognized by the second phone system; and 
 cause the abbreviated-dialed outgoing call to be communicated to the internet protocol based network by a second integrated access device. 
   
   
   
       19 . The feature server of  claim 18 , wherein the second phone system includes a customized dialing plan trigger to trigger a query to the feature server when the abbreviated-dialed call is not recognized by the second phone system. 
   
   
       20 . The feature server of  claim 18 , wherein the first phone system is one of a private branch exchange phone system and a centrex phone system.