Multiplex communications – Wide area network – Packet switching
Patent
1980-06-16
1982-10-12
Brown, Thomas W.
Multiplex communications
Wide area network
Packet switching
370 56, H04J 312
Patent
active
043542646
ABSTRACT:
A ringing control system which receives ring inputs, detects the type of input, translates the input into digital PCM format for transmission across a digital line such as a multiple channel span line. At the remote end of the line, the PCM signals are reconverted into relay operating data for emitting output signals of types corresponding to the input ringing signals. The ringing signals may be divided ring for either the tip lead or the ring lead and also may be frequency selective, superimposed or coded ringing. The arrangement is designed for use in a digital multiplexer or subscriber loop multiplexer.
REFERENCES:
patent: 3443033 (1969-05-01), Louis
patent: 3529089 (1970-09-01), Davis et al.
patent: 4001514 (1977-01-01), Wurst
"A Digital Carrier-Concentrator System with Elastic Traffic Capacity", by F. S. Boxall, IEEE Trans. on Commns., vol. COM-22, No. 10, Oct. 1974, pp. 1636-1642.
"Traffic Engineering for an Elastic Carrier-Concentrator System", by F. S. Boxall, IEEE Trans. on Commns., vol. COM-22, No. 10, Oct. 1974, pp. 1643-1650.
"Subscriber Line Equipment for an Elastic Carrier Switching System", by R. R. Buss, IEEE Trans. on Commns., vol. COM-22, No. 10, Oct. 1974, pp. 1651-1657.
Brown Thomas W.
Chaban Marvin M.
International Standard Electric Corporation
Raden James B.
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