Method and apparatus for providing local number portability
First Claim
Patent Images
1. A system for delivering a call to a ported called party having an associated pre-porting telephone number, comprising:
- a first switch operable to receive the call, the first switch assigned to service the pre-porting telephone number, the first switch operable to attempt to place the call to the called party, the first switch further operable to generate a trigger if the called party is no longer serviced by the first switch;
a service node coupled to the first switch, the service node operable to receive the call in response to the trigger generated by the first switch, the service node operable to generate routing information; and
a second switch coupled to the service node and identified by the routing information, the second switch operable to receive the call from the service node and to complete the call to the called party using the pre-porting telephone number.
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Accused Products
Abstract
A system (10) includes a calling party (12) that initiates a call to a ported customer (14). Upon receiving the call from calling party (12), switch (16) generates a trigger indicating that ported customer (14) is now being serviced by another switch (20). Switch (16) transfers the call to a service node (22) that includes a database (28) containing routing information. Service node (22) routes the call to switch (20) now providing service to ported customer (14). Several variations of calls to ported customer (14) are described.
183 Citations
20 Claims
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1. A system for delivering a call to a ported called party having an associated pre-porting telephone number, comprising:
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a first switch operable to receive the call, the first switch assigned to service the pre-porting telephone number, the first switch operable to attempt to place the call to the called party, the first switch further operable to generate a trigger if the called party is no longer serviced by the first switch; a service node coupled to the first switch, the service node operable to receive the call in response to the trigger generated by the first switch, the service node operable to generate routing information; and a second switch coupled to the service node and identified by the routing information, the second switch operable to receive the call from the service node and to complete the call to the called party using the pre-porting telephone number. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A service node for delivering a call to a called party that has ported from a first switch to a second switch, the called party serviced by the second switch and having a pre-porting telephone number assigned to the first switch, the service node comprising:
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a first trunk group operable to receive the call from the first switch upon the generation of a trigger by the first switch after an unsuccessful attempt to place the call at the first switch, the trigger indicating that the called party is no longer serviced by the first switch; a database operable to store routing information identifying the second switch as a switch that services the called party; and a second trunk group coupled to the first trunk group and the second switch, the second trunk group operable to deliver the call to the second switch according to the routing information. - View Dependent Claims (11, 12, 13, 14)
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15. A method for delivering a call to a ported called party having an associated pre-porting telephone number, comprising:
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receiving the call at a first switch, the first switch assigned to service the pre-porting telephone number; attempting to place the call to the called party at the first switch; generating a trigger at the first switch if the first switch is unsuccessful in placing the call, the trigger indicating that the called party is no longer serviced by the first switch; receiving the call at a service node in response to the trigger; identifying, at the service node, a second switch as a switch that services the called party; generating, at the service node, routing information for the second switch; receiving the call at the second switch according to the routing information; and completing the call to the called party using the pre-porting telephone number. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification