TREA

for the arrangements providing the connection (test connection, test call, call simulation)

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Industry

  • CPC
  • H04M3/323
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Parent Industries

HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M3/00Automatic or semi-automatic exchanges

Current Industry

H04M3/323for the arrangements providing the connection (test connection, test call, call simulation)
Industries