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FI (list display)

  • H04M7/00
    		•  Arrangements for interconnection between switching centres HB CC 5K201
  • H04M7/00@A
    		•  using the digital line HB CC 5K201
  • H04M7/00@Z
    		•  Others HB CC 5K201
  • H04M7/02
    		•  .for compensating differences of ground potential HB CC 5K201
  • H04M7/04
    		•  .for compensating differences of line impedance HB CC 5K201
  • H04M7/06
    		•  .using auxiliary connections for control or supervision HB CC 5K201
  • H04M7/06@A
    		•  Common line signalling system HB CC 5K201
  • H04M7/06@Z
    		•  Others HB CC 5K201
  • H04M7/08
    		•  .for phantom working HB CC 5K201
  • H04M7/10
    		•  .for two-way working, i.e. calls may be set-up in either direction over the same connection HB CC 5K201
  • H04M7/12
    		•  .for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal HB CC 5K201
  • H04M7/14
    		•  .in systems involving main and subordinate switching centres (current supply source at subordinate switching centre charged from main exchange H04M 19/06) HB CC 5K201
  • H04M7/16
    		•  .in systems employing carrier frequencies HB CC 5K201
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