Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2004-10-29
2008-10-28
Jung, Min (Department: 2616)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S389000
Reexamination Certificate
active
07443842
ABSTRACT:
The present invention provides a communication control apparatus for controlling incoming and outgoing telephone calls (communication) in a corporate private telephone network and among a plurality of corporate telephone networks by using the IP.The communication control apparatus includes a plurality of interfaces connected to the plurality of corporate networks and processor, wherein when the processor receives an IP packet from a terminal that belongs to a first corporate network through any of the plurality of interfaces, the processor determines which of the corporate networks an incoming terminal for the packet belongs to based on outgoing SIP-URI and incoming SIP-URI contained in the header of the IP packet and performs necessary control so as to connect the outgoing terminal and the incoming terminal depending on each of the network to which the outgoing terminal belongs and other networks.
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Nikkei Communications Aug. 11, 2003 No. 396 pp. 76-85.
Nikkei Communications Aug. 25, 2003 No. 397 pp. 82-83.
Hoshino Kazuyoshi
Kiyoto Satoshi
Miyamoto Takashi
Yumoto Kazuma
Antonelli, Terry Stout & Kraus, LLP.
Hitachi , Ltd.
Jung Min
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