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AssigneeSiemens Information and Communication Networks, Inc.
InventorEdward Sonnenberg
Estimating the term…
A method for enabling a plurality of Local Service Providers within a common Numbering Plan Area (NPA) to serve Subscribers of the plurality of Local Service Providers. The method includes the step of assigning to each Subscriber of a Local Service Provider within the common NPA a unique three digit code, hereinafter referred to as a SPA code. The service provider area (SPA) code is used by the telephone system in the same manner presently used for routing calls made when a calling Subscriber dials the NPA code of the called party. Here, however, the SPA code is not dialed by the calling Subscriber. The dialed directory number, NXX-XXXX, of a called Subscriber subscribed to a different Local Service Provider, is sent to a database. The database maintains a record of the relationships between the directory numbers of Subscribers and the SPA codes of the Subscribers. The database retrieves the SPA code associated with the dialed directory number presently serving the called Subscriber. The call is routed as SPA-NXX-XXXX. Because the ten digit format, SPA-NXX-XXXX, is the same as the present NPA-NXX-XXXX, ten digit format, existing signaling and routing mechanisms may be used to route the call. Thus, each one of the Subscribers of each one of the plurality of Local Service Providers is assigned a common SPA code, each one of the Local Service Providers having a different SPA code.
A method for routing a call to a called Subscriber having been assigned a directory number NPA-NXX-XXXX, and having moved to a different location where the Subscriber is served by a call routing number NYY-YYYY assigned to the Subscriber comprising the steps of:
A method for routing a call to a Subscriber having been assigned a directory number NXX-XXXX by one Local Service Provider and having changed to a different Local Service Provider, both Local Service Providers providing service within a common Local Access and Transport Area (LATA), and wherein the Subscriber has moved to a different location where the Subscriber is served by a call routing number NYY-YYYY assigned to the Subscriber comprising the steps of:
A method for routing a call to a Subscriber having been assigned a directory number NXX-XXXX by one Local Service Provider and having changed to a different Local Service Provider, and wherein the Subscriber has moved to a different location where the Subscriber is served by a call routing number NYY-YYYY assigned to the Subscriber comprising the steps of:
Dependencies are inferred from the claim text.