Method and apparatus for monitoring intermediate regenerative re

Details Method and apparatus for monitoring intermediate regenerative re Method and apparatus for monitoring intermediate regenerative re

1981-07-09

1983-09-27

Schreyer, Stafford D.

Telegraphy

Systems

Line-clearing and circuit maintenance

178 71T, 1791752C, H04L 2502, H04L 100

Patent

active

044069197

ABSTRACT:
A method and apparatus for monitoring remotely-fed intermediate regenerative repeaters, in which each intermediate regenerative repeater contains a digital signal regenerative repeater for the digital data signal transmitted and a telemetry signal regenerative repeater for the generation and transmission of a telemetry signal, and in which the telemetry and digital data signals are transmitted over the same transmission line in different frequency bands, provides that the telemetry signal comprises various data blocks. Start and end are characterized by at least one start block and by two end blocks. The result of monitoring is transmitted in an error block. Moreover, a self-check during the transmission of the error block is conducted. The result of the self-check is subsequently transmitted in a test block. Each intermediate regenerative repeater further transmits the received telemetry signal unaltered and following the recognition of the last telemetry signal transmitted by the preceding intermediate regenerative repeater, the regenerative repeater transmits its own locally-generated telemetry signal. At the receiving end, there is an assignment of intermediate regenerative repeaters and telemetry signals so that faulty equipment may be determined by counting of the telemetry signals.

REFERENCES:
patent: 3978449 (1976-08-01), Sanders et al.
Bax et al., "140 Mb/s Cozxizl Transmission System 8TR609", Philips Telecommunication Review, vol. 37, No. 3, Aug. 1979, pp. 144-160.

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