Noise signal level control in a TASI system

Details Noise signal level control in a TASI system Noise signal level control in a TASI system

1980-12-22

1983-10-04

Robinson, Thomas A.

Multiplex communications

Wide area network

Packet switching

179 1P, H04J 602, H04M 910

Patent

active

044083246

ABSTRACT:
Speech signals from a plurality of channels are interpolated in a TASI system for transmission via a lesser plurality of transmission facilities, such as telephone tie-lines which carry analog voice frequency signals. Recurrently, the level of noise received via each facility is measured at a receiver of the system while the facility is idle. An average of the monitored noise levels for all facilities, which is recurrently updated, is used to control the level of a noise signal which is supplied by the receiver to each off-hook channel for which speech signals are not being received via the facilities.

REFERENCES:
patent: 4059730 (1977-11-01), Messerschmitt et al.
patent: 4123620 (1978-10-01), Karlsson

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