Number portability using enhanced routing table
First Claim
1. In a telephone network having a number of telephone switching offices equipped with SSPs (Service Switching Points), a method of providing number portability for the treatment of calls from a calling party to a ported number of a called party, comprising the steps of:
- a) receiving digits dialed by said calling party at a switching office serving said calling party;
b) determining from a first directory number database collocated at a first exchange, whether the dialed digits are associated with a ported number;
c) querying a second directory number database to obtain routing information, if the dialed digits are determined at step b) to be associated with a ported number;
d) establishing a signalling path from said first exchange to a terminating exchange associated with the ported number by creating an Initial Address Message (IAM) according to said routing information; and
e) receiving said Initial Address Message (IAM) at said terminating exchange to enable the call to reach the called party.
2 Assignments
0 Petitions
Accused Products
Abstract
A method of providing number portability for the treatment of calls from a calling party to a specific number of a ported called party is disclosed. Once the dialed digits are received at a switching office serving the calling party, a determination is made of whether the call is a number that has been ported. If the number has been ported, the new routing information is obtained from an enhanced directory number table resident at the originating office. In the event that the originating office is unable to offer LRN service, information is obtained at an alternate office. Routing information is updated automatically and directly from a network Service Management System (SMS) to each telephone exchange.
114 Citations
24 Claims
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1. In a telephone network having a number of telephone switching offices equipped with SSPs (Service Switching Points), a method of providing number portability for the treatment of calls from a calling party to a ported number of a called party, comprising the steps of:
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a) receiving digits dialed by said calling party at a switching office serving said calling party; b) determining from a first directory number database collocated at a first exchange, whether the dialed digits are associated with a ported number; c) querying a second directory number database to obtain routing information, if the dialed digits are determined at step b) to be associated with a ported number; d) establishing a signalling path from said first exchange to a terminating exchange associated with the ported number by creating an Initial Address Message (IAM) according to said routing information; and e) receiving said Initial Address Message (IAM) at said terminating exchange to enable the call to reach the called party. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. In a telephone network having a number of telephone switching offices equipped with SSPs (Service Switching Points), a system for providing number portability for the treatment of calls from a calling party to a ported number of a called party, comprising:
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a) a first switching office for receiving digits dialed by said calling party; b) an alternate switching office connected to said first switching office via a signalling path established for routing a call associated with the dialed digits; c) first directory number database for determining whether said dialed digits are associated with a portable number collocated with said alternate switching office; and d) a second directory number database containing new routing information, for said dialed digits determined to be associated with a portable number and translating said dialed digits to provide new routing information, such that when an Initial Address Message (IAM) containing new routing information is received at a terminating office said terminating office can enable said call to reach said called party. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification