Systems and methods for managing a numbering plan area split...

Details Systems and methods for managing a numbering plan area split... Systems and methods for managing a numbering plan area split...

2011-04-19

2011-04-19

Tsang, Fan (Department: 2614)

Telephonic communications

Plural exchange network or interconnection

With interexchange network routing

C379S221080, C379S221130, C455S433000, C455S445000

Reexamination Certificate

active

07929683

ABSTRACT:
To route calls in a wireless network in which an NPA split has been implemented, an intelligent router mediates NPA mismatches by modifying requests for routing information according to a rule set based on the update status of the HLR or other network element to which the routing requests are directed. According to whether the intended network element has been updated to recognize a new NPA in the directory number, the appropriate version of the directory number is included in the routing request, regardless of whether the old or the new version of the directory was actually dialed. In some embodiments, the intelligent router first modifies the routing request to include the new version of the directory number, and upon receiving an error from the intended element, resends the request with the old version. Receiving an error may prompt the intelligent router to trigger an update of the intended element.

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