Transmission quality monitoring system for a digital communicati

Details Transmission quality monitoring system for a digital communicati Transmission quality monitoring system for a digital communicati

1995-07-27

1998-01-06

Hsu, Alpus H.

Multiplex communications

Diagnostic testing

Fault detection

370249, 370251, 370252, 370410, 370473, 370510, 370524, 370528, 34082514, 371 205, 379 5, 379230, 39518503, H04T 314, H04L 1226

Patent

active

057062803

ABSTRACT:
A digital communication network has a first end office which includes a first multiplexer unit and a second end office which includes a second multiplexer unit. The network performs transmission and reception of multiplexed signals between the first end office and the second end office. A monitor unit is provided within the first end office. Monitoring is performed of the accuracy of the signal received by the second end office from the first end office, signal accuracy information with regard to the received signal being included as subsignalling information in the input signal Sin which is input to the first end office from the second end office. The subsignalling information is extracted by the monitor unit from the input signal, so as to enable monitoring of the signal accuracy of the input signal. The result is a significant improvement in the improvement of transmission quality monitoring service provided in the digital communication network.

REFERENCES:
patent: 4989202 (1991-01-01), Soto et al.
patent: 5063564 (1991-11-01), Crandall et al.
patent: 5099480 (1992-03-01), Murata
patent: 5513173 (1996-04-01), Machemer et al.
Digital Cross-Connect System Requirements and Objectives, Technical Reference TR-TSY-00170 Issue 1, Nov. 1985.

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