Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2005-07-19
2005-07-19
Chin, Wellington (Department: 2664)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S395200, C379S093150
Reexamination Certificate
active
06920130
ABSTRACT:
A gateway adapter for a circuit switched PBX system to allow the PBX system to interoperate with a packet switched network containing a remote services unit. The gateway adapter includes a PBX interface for communicating with the PBX system, a network interface for communicating with the packet switched network and an interoperation functional unit to effect manipulation on data received by the two interfaces to allow the PBX system and the packet switched network to interoperate. One example of interoperation is to perform call processing functions on call sessions through the PBX system at a remote network services unit residing in the packet switched network.
REFERENCES:
patent: 6463051 (2002-10-01), Ford
patent: 2003/0081590 (2003-05-01), Maroulis et al.
patent: 0881 812 (1998-12-01), None
patent: 0881812 (1998-12-01), None
Korpi, Markku and Kumar, Vineet, “Supplementary Service in the H.323 IP Telephony Network”, Jul. 1999, IEEE Communications Magazine, pp 118-125.
Korpi, M., et al, “Supplementary Services in the H.323 IP Telephony Network,” IEEE Communications Magazine, IEEE Service Center, Piscataway, N.J., J.S., vol. 37, no. 7, Jul. 1999, pp. 118-125, XP000835313, ISSN: 0163-6804.
Chin Wellington
Nortel Networks Limited
Shew John
LandOfFree
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