Changes in Regenerating signals digital Transmission Systems.(15) in a consistent Recovery Circuit includes a Circuit (16) that generates square wave Narrow Ridges At intervals corresponding to the desired Alarm System; a Plurality of parallel Connected Filters (17) (18); and an Amplifier whose output is Fed to the cir Decision Circuit (14), each Filter Device can be an OASWith a line of different frequency band, the frequency band corresponding to a given Filter one of the regimes of bits used in the transmission Link. They are useful in the field of Telecommunications.
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