Multiplex communications – Wide area network – Packet switching
Patent
1986-06-17
1988-07-19
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370102, H04J 306
Patent
active
047590181
ABSTRACT:
Higher order digital transmission system including a multiplexer having N parallel inputs to which tributary input signal streams are applied, and a demultiplexer having N parallel outputs from which the tributary signal streams are taken. The signal processing operations, such as scrambling, justifying, line coding, error monitoring and word synchronization are effected before the multiplexer and after the demultiplexer, consequently not at the full line rate.
REFERENCES:
patent: 4121217 (1978-10-01), Chen
patent: 4143246 (1979-03-01), Smith
patent: 4276646 (1981-06-01), Haggard et al.
patent: 4410980 (1983-10-01), Takasaki et al.
J. B. Buchner, "Ternary Line Codes", Philips Telecommunication Review, vol. 34, No. 2, Jun. 1976, pp. 72-88.
A. Jessop, D. B. Waters, "4B-3T, An Efficient Code for PCM Coaxial Line Systems", Proceedings of 17th International Scientific Congress on Electronics, Mar. 16-17, 1970, Rome, Italy, pp. 275-283.
Recommendation G.922, "Digital Line System at 564992 kbit/s on Coaxial Pairs", CCITT Int'l Telephone and Telegraph Consulting Committee Book, Geneva, 1980, pp. 218-225.
AT&T Bell Laboratories
Busch James E.
Canepa Lucian C.
Olms Douglas W.
Philips Telecommunications BV
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