Excavating
Patent
1981-07-21
1984-04-03
Malzahn, David H.
Excavating
371 3, 375 4, G06F 1130
Patent
active
044411855
ABSTRACT:
A PCM regenerator is provided for pseudo-ternary signals occurring in the AMI code and having a connected code rule violation checking device which requires a monitoring and checking device. A problem regarding checking is that faults deliberately inserted into the transmission signal in the transmitting station are at least partially corrected in a first regenerator and are therefore not transmitted farther. The process, in accordance with the invention, provides the possibility that in each individual regenerator, specific portions of the regenerator may be monitored by the production of checking pulses and selectively in addition by the monitoring of the voltages at specific outputs. The invention is suitable for use in PCM lengths employing element speeds of a few 100 Mbit/s.
REFERENCES:
patent: 3866147 (1975-02-01), Courreur et al.
patent: 4078157 (1978-03-01), Lender et al.
patent: 4078159 (1978-03-01), Lender et al.
patent: 4086566 (1978-04-01), Lender
patent: 4276649 (1981-06-01), Groenendaal et al.
patent: 4337457 (1982-06-01), Tache
Williams et al., "Monitoring Error-Correcting Circuits", IBM Tech. Disc. Bulletin, vol. 10, No. 11, Apr. '68, pp. 1800-1801.
Malzahn David H.
Siemens Aktiengesellschaft
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