FXI-1A - Viking Electronics

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FXO / FXS / Telecom Smart Paging Interface

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Product Details

Viking’s FXI-1A universal paging interface allows you to provide paging from virtually any type of phone system instead of from a microphone. You can also provide background music and electronic night bell over the audio system.

The FXI-1A provides 30V talk battery for interfacing with an FXO or unused analog line input / trunk port. With the flip of a switch, the unit can connect to an FXS or PABX station ring trip port; no power supply is required in this mode. In the event that it must be connected to a “dry” 600 Ohm paging port, the built-in voice activation (VOX) is in control. This configuration is useful when interfacing with systems that do not provide a paging contact closure, such as Panasonic, South Western Bell, Intertel, etc.

In all modes the FXI-1A provides SPDT relay contacts to activate the central paging amplifier equipment or connect to an external background music source. After paging, the FXI-1A auto disconnects on CPC, busy signal, silence or page timer. An electronic night bell over paging feature can be activated from a momentary phone system contact closure (FXO and page port mode only).


  • Integrate your paging system with virtually any phone system
  • Suppress background music during paging
  • Provides contact closure to activate paging system if not provided by the phone system
  • Add pre-page tone to your paging system



  • Select: FXO (loop start), FXS (ring trip) or paging port (VOX relay) interface mode
  • No power supply required in FXS interface mode
  • 30VDC talk battery for interfacing with FXO or unused phone system line input / trunk port
  • Floating 600 Ohm paging output with volume control
  • SPDT relay for external paging amp activation or interfacing the paging amp with an external background music source
  • Pre-page alert tone (on/off)
  • Compatible with 24V to 48VDC FXS operation
  • Calling party control (CPC) detection for immediate disconnect
  • Busy signal detect disconnect
  • Adjustable silence disconnect time, 2.5 to 10 seconds or disabled
  • Selectable VOX trigger sensitivity, high or low
  • Adjustable page time out, 5 to 60 seconds or disabled
  • Screw terminal block connections
  • Wall mount housing: (2) #6 x 3/4″ panhead screws included


  • Power: 120VAC / 12VDC 500mA UL listed adapter included (not required in FXS mode)
  • Dimensions: 4.38″ x 2.97″ x 1.38″ (111mm x 76mm x 36mm)
  • Shipping Weight: 1.06 lbs (.48 kg)
  • Operating Temperature: 32°F to 90°F (0°C to 32°C)
  • Humidity: 5% to 95% non-condensing
  • Relay Contacts: 1A @ 30VDC / 0.5A @ 125VAC, 250VAC maximum
  • Minimum VOX Audio Signal to Activate Relay (normal sensitivity): -28dBm minimum @ 1KHz
  • Minimum VOX Audio Signal to Activate Relay (lower sensitivity): -25dBm minimum @ 1KHz
  • VOX Time Out Disconnect: 2.5 to 10 seconds or disabled
  • Page Time Out Disconnect: 5 to 60 seconds or disabled
  • Talk Battery: 30VDC
  • Connections: (10) cage clamp screw terminals


  • FCC Part 68
  • FCC Part 15