Automatic telecommunications systems

Details Automatic telecommunications systems Automatic telecommunications systems

1989-09-21

1992-11-03

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 60, 370 601, H04L 1256, H04J 312, H04G 1104

Patent

active

051611554

ABSTRACT:
An automatic telephone system enabling subscribers access to more than one network (3,4). The subscriber's line (2) accesses the networks (3,4) via a highway providing at least two traffic channels (B) and one signalling channel (D). The signalling channel (D) conveys call setting and other signalling for calls set up via any traffic channel (B). Access of a particular traffic signal channel to a particular network is provided by an intelligent multiplexer/concentrater (1) in response to a network identifier carried by the signalling channel, for example an appropriate value of a SAPI (Service Access Point Identifier) in the case of an ISDN I-Series signalling system.

REFERENCES:
patent: 4821265 (1989-04-01), Albal et al.
patent: 4835769 (1989-05-01), Donaghue, Jr. et al.
CCITT-Rec. Q. 920 and Q. 921.
International Conference on Communications '88, Session 47, paper 3, vol. 3, Jun. 12, 1988, Philadelphia, US pp. 1-6, E. Amada et al., "Integrated PABX/LAN system architecture".

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