Test signalling

Details Test signalling Test signalling

2011-07-12

2011-07-12

Hsu, Alpus H (Department: 2465)

Multiplex communications

Diagnostic testing

C370S248000, C379S027030, C455S067130, C455S067140, C455S423000, C704S246000, C714S712000

Reexamination Certificate

active

07978613

ABSTRACT:
The degree of degradation imposed on signals transmitted over a communications link from a transmitter to a receiver is tested. A predetermined test signal is transmitted using spare capacity detected by a voice activity detector when no speech is to be transmitted over the communications link. The test signal received by the receiver is compared with the reference signal, and a measure of the degradation of signals caused by the communications link is generated therefrom.

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