Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2003-04-09
2009-08-25
Kizou, Hassan (Department: 2419)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C379S221060, C379S231000
Reexamination Certificate
active
07580402
ABSTRACT:
The IP-PBX1includes a multimedia gateway controller2in which a call control data master table stores call control data for all terminals falling under the control of the IP-PBX and protocol handlers which are installed on a system bus101or expansion system bus102in a sufficient number for serving the number of circuits accommodated by the IP-PBX. On each of the protocol handlers, a microprocessor performs processing tasks corresponding to a load shared on it in interfacing with a given number of terminals, using a call control data slave table in its memory, call control protocol conversion function, fault-supervisory-processing function, call control protocol retransmission function, call control protocol transfer function, and terminal supervisory function.
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Masuhiro Mao
Watanabe Yasuhiro
Kizou Hassan
NEC Infrontia Corporation
O'Connor Brian T.
Young & Thompson
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