TREA

Signalling by amplitude or polarity of dc

Follow

Industry

  • CPC
  • H04Q5/06
This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

HELECTRICITY H04Electric communication H04QSELECTING H04Q5/00Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange

Current Industry

H04Q5/06Signalling by amplitude or polarity of dc
Industries