TREA

Encoding the ringing signal

Follow

Industry

  • CPC
  • H04M19/041
This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M19/00Current supply arrangements for telephone systems

Current Industry

H04M19/041Encoding the ringing signal
Industries