Communications transmission system

Details Communications transmission system Communications transmission system

1979-06-20

1981-09-01

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 84, H04J 316

Patent

active

042875919

ABSTRACT:
The present invention relates to a communications transmission system wherein there is superposed, on the conventional analog telecommunication network, a digital network whose digital local exchanges are connected with digital subscriber stations. Both networks are interconnected between the analog and digital local exchanges by way of analog/digital converters and digital/analog converters. In each digital subscriber station, a data transmission is possible simultaneously with voice transmission due to an automatic sub-channel formation by means of a multiplexer and a demultiplexer. An arrangement is provided for data clock pulse recognition to determine at which bit rate the respective data terminal operates, and causes a suitable sub-channel for the data to be arranged with a bit rate which is obtained from the voice channel.

REFERENCES:
patent: 3046346 (1962-07-01), Kramer
patent: 3748393 (1973-07-01), Baxter
patent: 3790715 (1974-02-01), Inose et al.
patent: 3988545 (1976-10-01), Kuemmerle et al.
patent: 4115662 (1978-09-01), Guinet et al.

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