Multiplex communications – Wide area network – Packet switching
Patent
1990-11-01
1993-05-04
Kuntz, Curtis
Multiplex communications
Wide area network
Packet switching
3701101, H04J 324
Patent
active
052088111
ABSTRACT:
In a network system in which an interconnection is achieved between an LAN terminal connected to an LAN and an ISDN terminal linked with an ISDN via at least an LAN/ISDN inter-working unit coupling the LAN with the ISDN, the ISDN terminal develops a function to multiplex data link connections (communication paths) identified with respective data link connection identifiers (DLCIs) on ISDN channels. After conducting a call establishment to the ISDN terminal, the inter-working unit supplies the LAN terminal with an ISDN channel number and a DLCI designating an ISDN communication path. Thereafter, the LAN terminal sends an LAN frame having an OSI layer 2 header loaded with the communication path information to the inter-working unit. On receiving the LAN frame, the inter-working unit executes a format conversion to convert the LAN frame into an ISDN frame based on the ISDN communication path information.
REFERENCES:
patent: Re33426 (1990-11-01), Sugimoto et al.
patent: 4926420 (1990-05-01), Shimizu
patent: 4930123 (1990-05-01), Shimizu
Dieter Japel et al "LAN/ISDN Interconnect Via Frame Relay", IBM Research Division, Zurich Research Laboratory, Session 54.2.1 of the 1988 Globecom.
Harakawa Takeshi
Kashio Jiro
Kawakita Kenji
Kunimoto Masao
Takemura Tetsuo
Ghebretinsae T.
Hitachi , Ltd.
Kuntz Curtis
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