Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Patent
1995-05-26
1997-02-04
Safourek, Benedict V.
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
370410, H04L 1256
Patent
active
056006411
ABSTRACT:
Voice circuit emulation system in a packet switching network includes a plurality of switching nodes (SW-1, SW-2, . . . ) interconnected by connection lines (TL-1, TL-2, . . . ), enabling voice signals to be transmitted in circuit emulation packets from any source exchange telephone device (PBX-A) to any destination exchange telephone device (PBX-B). Each switching node (SW-1 or SW-2) includes a circuit emulation server (CES-1 or CES-2) including a plurality of connection tables corresponding each to an incoming connection line, each table containing for each incoming connection line, the identification of each outgoing connection line associated to each slot of the circuit emulation packet received from the incoming connection line and the identification of each slot of the packet to be transmitted on the outgoing connection line. A switching module looks up the connection table for each slot contained in each incoming circuit emulation packet received from all incoming lines and thereby transferring the contents thereof to the slot of the outgoing connection line identified in said connection table.
REFERENCES:
patent: 5199027 (1993-03-01), Barri
patent: 5276677 (1994-01-01), Ramamurthy et al.
patent: 5357508 (1994-10-01), Boudec et al.
patent: 5379277 (1995-01-01), Yamashita et al.
Int. Switching Symposium, vol. V May 27, 1990, pp. 1-8.
IEICE Trans. on Communications., vol. E76-B No. 7, Jul. 1993 pp. 719-722.
Duault Maurice
Galand Claude
Lebizay Gerard
Cockburn Joscelyn G.
International Business Machines - Corporation
Safourek Benedict V.
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