Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
Patent
1997-02-20
1999-09-07
Hong, Harry S.
Telephonic communications
Plural exchange network or interconnection
Interexchange signalling
379230, 379207, 379220, 370389, H04M 700, H04L 1228
Patent
active
059498714
ABSTRACT:
A method of providing a service, such as local number portability (LNP), in a switched telecommunications system, in which a message interceptor is disposed in a signalling link of an SS7 signalling network of the system. The message interceptor detects calls for which service implementation is required, by comparing the content of intercepted circuit-related SS7 messages with service trigger conditions, such as message type (checked directly by the interceptor) and message content (e.g. called number, which the interceptor checks by reference to a database). When service implementation is detected as being required, the message interceptor may implement at least part of the required service by modifying parameters of the intercepted message; alternatively, the interceptor may re-direct the message to a service control function for service implementation. The invention enables services to be implemented without incurring inefficient use of core network resources, and without expensive and time-consuming modification of switch and SCP control software.
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EPO Search Report EP 97 30 0799.
Carson Douglas John
Galloway James Robertson
Kabay Salih
Mottishaw Peter John
Hewlett--Packard Company
Hong Harry S.
Tieu Benny Q.
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