FBSAR - Audio Interface Unit

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The FBSAR board


  • Provides interface to non-selective radio systems (1 base station)
  • Two relays for busy marking of external equipment and transmitter keying
  • Two optocouplers, which may be used for mutual busy marking
  • Provides interface to PA systems (2 PA zones)
  • DC termination of two subscriber outputs
  • Two filters to remove carrier for display data signals on two subscriber audio outputs
  • Second channel may be used as filter / PA adapter only
  • Galvanic separation between the exchange and the external equipment
  • If the relay is used, the FBSAR must be powered with +24V from the exchange

Connectors and Switches

Connectors and Switches

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