TREA

Dual frequency signaling, DTMF

Follow

Industry

  • CPC
  • H04Q2213/13405
This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

HELECTRICITY H04Electric communication H04QSELECTING H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems

Current Industry

H04Q2213/13405Dual frequency signaling, DTMF
Industries