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PCE
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CPC Subgroup
H04Q 1/32

using trains of DC pulses (H04Q1/39 takes precedence)

Full Title

Details of selecting apparatus or arrangements > Electrical details > Signalling arrangements; Manipulation of signalling currents (multiplex systems providing for calling or supervisory signals H04J1/14, H04J3/12) > using trains of DC pulses (H04Q1/39 takes precedence)

2 direct subcodes

Child Classifications

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  • H04Q 1/34 Impulse regenerators with mechanical or other non-electrical marking arrangements
  • H04Q 1/36 Pulse-correcting arrangements, e.g. for reducing effects due to interference