Multiplex communications – Wide area network – Packet switching
Patent
1994-02-04
1997-04-15
Kizou, Hassan
Multiplex communications
Wide area network
Packet switching
370 67, 3701101, 379 94, 379231, H04Q 500, H04M 100
Patent
active
056217315
ABSTRACT:
An integrated services digital network (ISDN) private exchange device is provided, which includes connectors for connection to an ISDN local exchange, a plurality of ports for connection to respective analog telephone devices, a plurality of ports for connection to respective digital devices, and an ISDN digital port for connection to at least one additional ISDN terminal device. The private exchange device may include a pair of ports for connection to two different analog telephone devices, each having simultaneous access capability with the ISDN network. Further, the private exchange device may include four ports for connection up to four digital devices, which are each capable of simultaneously accessing the ISDN local exchange. The ISDN digital port can be connected with up to eight ISDN terminals or terminal adapters. The private exchange device may further include a detector for detecting whether the port connected to the local exchange is connected to an ISDN network or to a conventional network and for bypassing an ISDN control circuit if the system detects that it is connected to a conventional analog network.
REFERENCES:
patent: 3952172 (1976-04-01), Penn et al.
patent: 4535202 (1985-08-01), Meunier
patent: 4551581 (1985-11-01), Doughty
patent: 4575585 (1986-03-01), Brown
patent: 4652701 (1987-03-01), Cubbison, Jr.
patent: 4709388 (1987-11-01), Defretin
patent: 4737986 (1988-04-01), Tsunoda
patent: 4740955 (1988-04-01), Litterer et al.
patent: 4805213 (1989-02-01), Schlanger
patent: 4808905 (1989-02-01), Chen et al.
patent: 4839920 (1989-06-01), Held-Elbert et al.
patent: 4868873 (1989-09-01), Kamil
patent: 4953195 (1990-08-01), Okemori
patent: 4979171 (1990-12-01), Ashley
patent: 4998243 (1991-03-01), Kao
patent: 5008884 (1991-04-01), Yazawa et al.
patent: 5023868 (1991-06-01), Davidson et al.
patent: 5027345 (1991-06-01), Littlewood et al.
patent: 5054055 (1991-10-01), Hanle et al.
patent: 5060241 (1991-10-01), Allouis et al.
patent: 5067125 (1991-11-01), Tsuchida
patent: 5077734 (1991-12-01), Ohtsuka
patent: 5113396 (1992-05-01), Kagami
patent: 5193110 (1993-03-01), Jones et al.
patent: 5291549 (1994-03-01), Izumi
patent: 5398246 (1995-03-01), Fujioka
patent: 5400397 (1995-03-01), Ryu
patent: 5414760 (1995-05-01), Hokari
patent: 5416835 (1995-05-01), Lee
"A Catalog of National ISDN Solutions for Selected NIUF Applications," Second Edition, Contributed by NIUF Applications Analysis Working Group, Oct. 19, 1993, pp. 1-1 -I-9.
Bayerl Thomas R.
Dale Allan D.
Dick Brian P.
Dougherty John C.
English Scott W. B.
Kizou Hassan
Omnilink Communications Corporation
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