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Internal View
of the CPC-4
(one channel)
From PABX station,
T-1 channel bank line
or any other line
without CPC
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A. Generating a CPC Disconnect
The CPC-4 monitors audio activity on each line to determine when to generate a CPC disconnect signal. A CPC dis-
connect signal is generated if busy signal cadence, or a reorder tone (fast busy) cadence is detected. Using DIP switch-
es 1 & 2, the CPC-4 can also be programmed to generate a CPC disconnect signal based on uninterrupted silence.
The CPC-4 will not respond to originating Dial Tone, but can be programmed to generate a CPC disconnect signal if
the line returns to Dial Tone (steady audio).
B. LED Operation
Each channel is in use when the corresponding LED is on. The LED will light extra bright when audio is detected. For
example, a busy signal can be seen as the LED toggling between "on" and "extra bright" in a 1/2 second pattern.
Steady silence shows as steady on, dial tone shows as steady extra bright, and talking shows a random pattern.
The LED will wink "off" for 1 second when the unit generates a CPC disconnect signal. The LED will then remain off
when the line is cleared and not in use.
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Due to the dynamic nature of the product design, the information contained in this document is subject to change without notice. Viking Electronics, and its affiliates and/or subsidiaries
assume no responsibility for errors and omissions contained in this information. Revisions of this document or new editions of it may be issued to incorporate such changes.
Fax Back Doc 444
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DIP
Switch 1
DIP
OFF
Switches
OFF
ON
ON
OFF
2
3
ON
DIP
Switch 3
To PABX trunk
OFF
input, voice
mail system,
ON
phone, etc.
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Printed in the U.S.A.
DIP Switch Programming
DIP
Switch 2
Description
OFF
Silence time disabled
ON
Will CPC on 10 seconds of silence
OFF
Will CPC on 20 seconds of silence
ON
Will CPC on 30 seconds of silence
Description
Will not CPC on a return to dial tone.
Will generate a CPC on a return to dial tone.
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ZF302740 Rev 2
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