Transmission system for digital repeater supervisory code transm

Multiplex communications – Wide area network – Packet switching

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375 31, 371 49, H04J 116, H04J 314

Patent

active

047379499

ABSTRACT:
In a transmission system, which includes one or more digital repeaters in a transmission line and a digital multiplex/demultiplex branching unit, a code for supervising the digital repeater or repeaters in an in-service state is transmitted according to a data sequence signal obtained through bit-by-bit time-division multiplexing of at least two different kinds of digital signals. The supervisory code has a configuration of a transmission line code obtained by dividing the digital signals into blocks of bits corresponding in number to the sum (n.times.m'+1) of the product of the number n of channels of the digital signals and positive odd number m' and one and adding after each of the blocks a number of parity bits (supervisory bits) corresponding to the respective digital signals equal to the number of the channels, i.e., has a bit configuration of n(m'+1)+1.

REFERENCES:
patent: 3757051 (1973-09-01), Girard et al.
patent: 3950622 (1976-04-01), Taylor
patent: 4266183 (1981-05-01), Steensma et al.
patent: 4402075 (1983-08-01), Bargeton et al.
patent: 4653070 (1987-03-01), Nakajima et al.

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