Communication system

Details Communication system Communication system

1995-08-29

1997-09-30

Olms, Douglas W.

Multiplex communications

Pathfinding or routing

Through a circuit switch

379 91, 379201, H04Q 130, H04M 342

Patent

active

056732619

ABSTRACT:
A communication system including a switching system which comprises a switching unit and a control circuit. The control circuit comprises a transmitting-side signalling handler procedure (ASH) for managing the connection and for exchanging messages with other procedures, and a receiving-side signalling handler procedure (BSH) for managing the connection and for exchanging messages with other procedures. For providing optional external services, the switching unit is coupled to a service control system. Furthermore, the control circuit comprises an additional procedure (ZUSA) for exclusively exchanging messages with the transmitting-side and the receiving-side signalling handler procedures (ASH, BSH). For specific messages, the additional procedure (ZUSA) is provided for exchanging messages by a service program (SERV) of the service control system and, dependent upon the messages produced by the service program (SERV), provided for sending messages to the transmitting-side and/or receiving-side signalling handler procedures (ASH, BSH).

REFERENCES:
patent: 4791640 (1988-12-01), Sand
patent: 5499290 (1996-03-01), Koster
patent: 5526413 (1996-06-01), Cheston, III et al.
"Hardware und Software des Dienstvermittlungssytems Passt" by J. Friedrichs, H.G. Hopf and M. Krekeler, PKI Tech. Mitt Feb. 1989, pp. 15 to 23.

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