H - Electricity – 04 – J
Patent
H - Electricity
04
J
363/1
H04J 6/02 (1980.01)
Patent
CA 1043914
ABSTRACT The present invention describes an improved PCM-TASI signal trans- mission system. Generally, input trunks are arranged to provide time div- ision multiplex transmission of a plurality of intermittent PCM information signals. The information signals received are selectively transmitted thr- ough transmission channels, the selections being controlled by an assignment controller which selects only those input trunks which have a signal at a particular time. The transmitted signals are sent to receivers in a manner similar to the input signals. The improvements comprise an assignment con- troller which has 3 memories responsive to the output signals of an infor- mation signal detector, the assignment state signals, and the input trunk and transmission channel numbers, and a fourth memory which partly renews its contents depending on the third memory. The memories contents determine the assignment and then renew their contents. The transmission system also varies the sequence of transmissions of the input signals to the assignment contro- ller periodically. A variable reader varies the sequence of reading the second memory periodically.
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