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TECHNICAL

TECHNICAL

The 

CPC-1

will generate a CPC disconnect signal on a

PABX analog station (or any other line that does not pro-
vide 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.) 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.

Generate a CPC Disconnect Signal

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•  Phone line powered (no AC needed)

•  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 minimum)

Dimensions:

74mm x 53mm x 25mm (2.9" x 2.1" x 1.0")

Shipping Weight:

0.45Kg (1 lbs)

Environmental:  

0° C to 32° C (32° F to 90° F) with 5% to 95%

non-condensing humidity

CPC Disconnect Time: 

1 second nominal

Connections: 

4 position screw terminal block

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•  Tandem PABX configuration
•  Analog PABX station to Trunk talk paths 

between two PABXs

•  C.O. lines that don’t provide CPC
•  Voice Mail behind PABX
•  Add CPC disconnect signal to T-1 channel 

bank lines

•  Call sequencers behind PABX
•  ISDN
•  VOIP

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CPC-1

CPC-1

CPC Disconnect

September 23, 2005

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