Ring communication system using ISDN

Details Ring communication system using ISDN Ring communication system using ISDN

1995-06-08

1997-10-21

Teska, Kevin J.

Multiplex communications

Wide area network

Packet switching

39520021, 370901, 370904, H04L 1228

Patent

active

056805896

ABSTRACT:
Ring communication system using ISDN including terminal adapter hardware and associated software that can be combined with a general purpose computer and used to provide a work station or party unit which can be linked together with other similarly configured units via the ISDN to provide a closed wide area network. Although the system can be implemented on any type of computer using any programming language, in the preferred embodiment proprietary software designated WinISDN.DLL in a Microsoft Windows.TM. environment is used to implement a novel algorithm in Visual Basic or C-language programming systems. The hardware aspects of the invention are provided in a terminal adapter card that includes a dual port RAM, an ISDN controller, and a subscriber access controller. The adapter card plugs into the (E)ISA bus that is the PC standard bus/backplane.

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