CPC-1 - Viking Electronics

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Generate CPC Disconnect on an Analog Phone Line

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Product Details

The CPC-1 will generate a CPC disconnect signal on a PABX analog station (or any other line that does not provide this signal).

A CPC (Calling Party Control) signal is a momentary break in phone line loop current, which is used to signal automated telco equipment (ie. voice mail, call sequencers, etc.) that the distant party has hung up. Central Office telephone lines typically provide this signal, but analog PABX stations do not.

The CPC-1 will generate a 1 second disconnect when it detects a busy signal, reorder tones (fast busy), return to dial tone, or silence.


  • Tandem PABX configuration
  • Analog PABX station to trunk talk paths between two PABXs
  • Voice mail behind PABX
  • Add CPC disconnect signal to T-1 channel bank lines
  • Call sequencers behind PABX
  • VOIP modems



  • Phone line powered
  • Generates CPC disconnect on:
    • Return to dial tone (programmable)
    • Busy signal
    • Reorder (fast busy)
    • Steady silence (programmable)
  • LED shows:
    • In use
    • Audio detected
    • Generated CPC signal
  • Caller ID compatible


  • Power: Telephone line powered (20VDC / 20mA)
  • Dimensions: 2.9″ x 2.1″ x 1.0″ (74mm x 53mm x 25mm)
  • Shipping Weight: 1 lbs (0.45Kg)
  • Temperature: 32°F to 90°F (0°C to 32°C)
  • Humidity: 5% to 95% non-condensing
  • CPC Disconnect Time: 1 second
  • Connections: (4) cage clamp screw terminals