TREA

wherein the key telephone sets are star-connected to a central unit by a limited number of lines

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Industry

  • CPC
  • H04M9/007
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Parent Industries

HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M9/00Interconnection arrangements not involving centralised switching

Current Industry

H04M9/007wherein the key telephone sets are star-connected to a central unit by a limited number of lines
Industries