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The IF4W4 modular 4-wire interface connects camera intercoms, two-way radios, fiber optics, and other 4-wire devices to a standard Clear-Com intercom line.

Note: Access the Encore Power Supply Calculator to estimate power requirements for analog partyline systems.


  • Interfaces TV cameras, 2-way radios, fiber circuits and other 4-wire devices to Clear-Com partyline
  • Individual Transmit Receive and Null controls
  • Transmit output switchable between mic and line level
  • Built-in test jack and oscillator for quick nulling
  • Selective partyline capability
  • Accepts balanced or unbalanced 4-wire input
  • Transformer isolated
  • Terminal block and XLR connectors for each interface
  • Powered by the intercom line

Item Code



Program Line Input
Input Impedance: >= 1K
Partyline Output
Output Impedance: >10K
Stage Announce/Balanced Line Out

Type: Balanced

Output Impedance: >= 80

Load Impedance: >= 600

Frequency Response

Program Input - Partyline: 200 - 18kHz ± 3dB

Partyline - Line Out: 200 - 18kHz ± 3dB

Max Distortion

Program Input - Partyline: <= 0.2%

Partyline - Line Out: <= 0.5%


Program Input - Partyline: < -85dBu

Partyline - Line Out: < -60dBu

Max Gain

Program Input - Partyline: >= -16dB

Partyline - Line Out: >= 24dB

Min Gain

Program Input - Partyline: <= -20dB

Partyline - Line Out: <= -45dB

Line Out LED Threshold

Green: -7dBu ± 2dB

Red: +5dBu ± 2dB

Partyline LED Threshold
Green: -10dBu ± 2dB Red: 0dBu ± 2dB

Input Voltage Range: 20-30V DC

Input Current (Idle): <= 40mA

Input Current (Max): <= 50mA

32 - 122°F (0 - 50°C)

1.75 x 19 x 7.75in (HxWxD)

(44 x 483 x 197mm)

5.8lbs (2.7kg)

Ready to get

Our team of communications professionals are here to support your project. Contact us today to start designing your custom intercom solution.

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