Multiplex communications – Wide area network – Packet switching
Patent
1993-10-18
1995-09-12
Kizou, Hassan
Multiplex communications
Wide area network
Packet switching
370 79, 370 851, 3701101, H04L 1200
Patent
active
054503965
ABSTRACT:
An integrated services communication system ISDN in which a plurality of ISDN supported terminal stations can be coupled to an S.sub.0 bus coupled to a private branch exchange, of which a maximum of 2 terminal stations can be active over B-channels. Them is proposed also to connect incompletely ISDN supported terminal stations to the S.sub.0 bus, which stations have many non-ISDN supported features, there being investigated on line cards which type of terminal station is connected. On the basis of a Terminal Endpoint Identifier (TEI) in a layer-2 message, either a standard ISDN protocol is handled from layer-2 onwards, or a firm-owned protocol.
REFERENCES:
patent: 4835769 (1989-05-01), Donaghue, Jr. et al.
patent: 4888766 (1989-12-01), Ogasawara
patent: 5008884 (1991-04-01), Yazawa et al.
"Datenkommunikation" D. Conrads, Friedr. Vieweg & Sohn, 1990, pp. 199-219.
"Facilities for Users of Sopho-Set Feature Phones" Philips Telecommunication and Data Systems Review, vol. 48, No. 1, Mar. 1990, pp. 20-27.
"Integrated Services Digital Network" CCITT Recommendation I.440.
Balconi-Lamica Michael J.
Kizou Hassan
Schreiber David
U.S. Philips Corporation
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