H - Electricity – 04 – J
Patent
H - Electricity
04
J
363/13
H04J 3/02 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 1235236
ABSTRACT Digital Line Termination Unit Command Interface The digital line termination unit command interface is for telecommunications exchanges wherein control information is sent to the digital line termination unit, using PCM signalling techniques, characterised in that during each idle time slot of the PCM signal a synchronisation pattern is sent to the digital line termination unit, and a command code is preceded and followed by the synchronisation pattern and verified as a correct code when the preceding and following synchronisation patterns are determined valid by the digital line termination unit.
475456
Ansell John W.
Maddern Thomas S.
Borden Ladner Gervais Llp
Plessey Company Plc (the)
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