Telephonic communications – Special services – Service trigger
Patent
1995-01-04
1997-09-02
Tsang, Fan
Telephonic communications
Special services
Service trigger
379 67, 379210, 379230, H04M 342
Patent
active
056640102
ABSTRACT:
The system and method of the present invention provides an improved service node containing at least one service application, a conversion process and a TCP/IP service circuit handler for communicating with a TCP/IP-driven external peripheral device over a communications link. According to a preferred embodiment, by selecting a switch as the TCP/IP-driven external peripheral device, the call capacity of the improved service node can also be increased. This is preferably accomplished by receiving an incoming call into the external switch, notifying the improved service node of the incoming call, and creating an instance of the service application on the service node, which service application is associated with the incoming call. The service application requests the switch place a corresponding outgoing call--which it does. The switch then hairpins the incoming and outgoing calls together and notifies the service application of their connection. The improved service node then tears down its instance of the call, thereby releasing the associated memory supporting the instance, as well as the connection (but not the communication link) between the service node and the switch, all without disturbing the hairpinned calls. The hairpinned calls remain stored in the switch fabric of the external switch until one of the hairpinned calls reports an on-hook condition.
REFERENCES:
patent: 5418844 (1995-05-01), Morrisey et al.
patent: 5469500 (1995-11-01), Satter et al.
"Transparent Message Routing Between An SS #7 Network and X.25 Network", IBM Technical Disclosure Bulletin, vol. 35 No. 3, Aug. 1992.
Bernritter Raymond E.
Finkelstein Mark I.
Ginsberg Ross
Goos Darren
Lee Robert S.
Electronic Data Systems Corporation
Griebenow L. Joy
Tsang Fan
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