Concentrator in a subscriber loop digital carrier system

Details Concentrator in a subscriber loop digital carrier system Concentrator in a subscriber loop digital carrier system

1980-09-12

1983-08-09

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

179 18FC, H04Q 1104, H04J 302

Patent

active

043982840

ABSTRACT:
A digital concentrator system for use with a plurality of digital carrier systems in the telephone subscriber loop plant is disclosed. The concentrator system comprises a central office terminal (100), a remote terminal (102), and an interconnecting digital carrier path (108). In the transmit direction at each terminal (110,112), a plurality of multiplexed encoded signal streams are demultiplexed and the encoded signals stored. A selected number of encoded signals are retrieved and multiplexed for transmission to a distant terminal (112,110) as a concentrated pulse stream (123,175). In the receive direction at each terminal (110,112), the encoded signals in the multiplexed concentrated stream (125,177) are demultiplexed and stored. The stored encoded signals are retrieved and the original number of encoded signal streams derived for transmission to the carrier terminal (100,102). Supervisory and control communication between the two concentrator terminals (110,112) is achieved by way of data messages on a derived data link. Operation between the transmit and receive directions at each terminal is asynchronous and controlled by a microcomputer (124,160).

REFERENCES:
patent: 4001514 (1977-01-01), Wurst
patent: 4197427 (1980-04-01), Hutcheson
patent: 4232386 (1980-11-01), McDonald et al.
patent: 4288870 (1981-09-01), McDonald et al.
"Exploratory PCM Integrated Switching and Transmission System for Local Networks", Electrical Communications, vol. 47, No. 2, 1972, pp. 77-78.

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