Patent ID: 6438223
Filing Date: 2002-08-20
Classification: H04Q

Abstract:
In a telecommunication system having a group of interlinked, addressable exchanges, where a call is routed to a destination exchange therein, the call routing being setup in cooperation with a signaling packet containing an address of the destination exchange passed between exchanges routing the call, a method of porting a subscriber's directory number from a first access point provisioned in a first exchange to a second acces point provisioned in a second exchange among said group of exchanges, comprising:providing a database for obtaining an address of an exchange provisioning a given directory number, said database being accessible by said group of interlinked, addressable exchanges; maintaining said database to reflect said subscriber's directory number being provisioned by the second exchange instead of the first exchange; and intercepting a signaling packet associated with a call to said subscriber's directory number, wherein said intercepting results in additional steps, including: querying said database with said subscriber's directory number to obtain an address for the second exchange; and modifying the address of the destination exchange contained in the intercepted signaling packet by substituting it with that of the second exchange; and passing the modified signaling packet to an exchange among said group of exchanges so that said call to said subscriber's directory number is routed to the second exchange accordingly.