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Listen-Only IFB Earset Station


RTS' IFB-325 is a listen-only IFB earset station with one channel.
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Our Price: $219.00
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RTS' IFB-325 is a listen-only IFB earset station with one channel.  The IFB-325 provides a mono (either interrupt or non/interrupt selected at 4010) audio signal to the user.  The IFB-325 features volume controls in an extruded aluminum case.


  • Supplied Power Requirements: 32 VDC nominal (standard RTS line). 50 to 80 mA
  • Dimensions: 5" (127 mm) high, 3.5" (88.9 mm) wide, 1.8" (45.7mm) deep
  • Weight: 1.0 pounds (0.45 kg)
  • Environmental Requirements:
    - Storage: -WC to 80T 0% to 95
    - Humidity: non-condensing
    - Operating: PC to 50T 0% to 95%
    - Humidity: non-condensing
  • Earset: 150 to 600-1/2 headphones
  • RTS Intercom Channel:
    Input Level: 2 Vpp (0 dBu) nominal
    Input Impedance: 200-1/2 ┬▒5%
  • Noise Contribution: Less than -60 db on the line
  • Voltage Gain: 27 ┬▒3 dB from the line
  • Maximum Output: 165 mW into -1/2
  • Frequency Response: 250 Hz to 8kHz +1/-4dB
  • Headset Connector
    Type: 1/4" Monaural Plug
    Sleeve: Headset audio low
    Tip: Headset audio high
  • Intercom Channel Connectors
    Type: XLR-3F
    Pin 1: Common
    Pin 2: Intercom channel 1 (audio and +32 VDC input)
    Pin 3: Intercom channel 2 (audio)

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