Digital concentrator for use with a digital telephone office

Details Digital concentrator for use with a digital telephone office Digital concentrator for use with a digital telephone office

1981-08-05

1983-05-24

Brown, Thomas W.

Multiplex communications

Wide area network

Packet switching

370 67, H04Q 1104

Patent

active

043853790

ABSTRACT:
Signals from line circuits requesting service are transferred to a T1 channel via a Pulse Amplitude Modulated (PAM) bus. The number of line circuits which can be served by a T1 line is not limited by the capacity of the T1 line since the probability of all line circuits requesting service at the same time is extremely low. A processing unit detects requests for service and assigns them a slot in a memory which defines the scanning sequence for insertion of line circuit signals in the T1 channel.

REFERENCES:
patent: 3924077 (1975-12-01), Blakeslee
patent: 4232386 (1980-11-01), McDonald et al.
patent: 4286119 (1981-08-01), Stelte et al.
"Study of a Rural Digital End Office", by M. J. Kelly, GTE Automatic Electric Journal, May 1977, pp. 294-302.
"Two Terminals for DMS-1", by B. Klodt, Telesis (Canada), Aug. 1977, pp. 107-112.

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