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The call termination on Helios on 2N® Analog Intercoms devices can be done as described bellow:

  1. The busy or continuous tone *) after the call end.
  2. The ringing tone *) after a predefined count of rings.
  3. The subscriber 'at the other end' pressed  .
  4. The preset maximum call duration has elapsed.
  5. 30 seconds after the switch use has elapsed.
  6. A 2N® Helios button A 2N® Analog Intercom button was pressed during the call.
  7. The  keypad button was pressed during the call (can be disabled).


  • In some cases can also help to increase parameter 944 also when 2N® Helios is Analog Intercom is placed in a hall or corridor with a large decay time. t