General Features
22
Features Guide
Calling Party Control (CPC) Signal Detection
Description
The Calling Party Control (CPC) Signal is an on-hook indication (disconnect signal) sent from
the Central Office when the telephone is hung up at the other end. To maintain efficient
utilization of CO lines, the system monitors their status and when CPC Signal is detected from
a line, the system disconnects the line and alerts the extension with a reorder tone.
Conditions
•
This feature is enabled or disabled on incoming and outgoing CO calls separately by System
Programming.
•
CPC Signal Detection on outgoing CO calls
Generally CPC Signal Detection works on incoming CO calls, and does not work on
outgoing CO calls (except once they are placed on Call Hold, Exclusive Call Hold or
Consultation Hold). In this case, if the extension user remains off-hook after the completion
of an outgoing CO call, the system does not release all the switches used to establish the
connection. The connected CO line will continue to be in use. To prevent this, it is
programmable to make CPC Signal Detection work on outgoing CO calls.
Note:
Some Central Offices (CO) may send CPC-like signals during the dialing sequence
and an attempt to make a call may be terminated. If your CO sends such signals, it is
recommended to make CPC Signal Detection work on outgoing CO calls.
•
Digits Restriction in CO Talk Mode
If your Central Office does not send CPC-like signals, it is effective to limit the number of
dialing digits permitted during a CO call by System Programming <Section 2.4 Class of
Service (COS), "Digits Restriction in CO Talk Mode" in the Programming Guide> to
prevent unauthorized calls.
•
If a CPC Signal is detected during a Conference call, the line is disconnected and the
remaining two parties resume the call.
•
If a CPC Signal is detected during a DISA call, the line is disconnected.
Programming Guide References
•
2.4 Class of Service (COS)
– Digits Restriction in CO Talk Mode
•
4.2 Trunk Line
– [CPC Signal] OUT Detection
– [CPC Signal] OUT Detection—Detection Time
– [CPC Signal] IN Detection
– [CPC Signal] IN Detection—Detection Time
Features Guide References
None
Summary of Contents for KX-TD500
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Page 107: ...General Features Features Guide 107 User Manual References 4 4 12 Trunk Busy Out Setting...
Page 162: ...General Features 162 Features Guide User Manual References 4 3 54 Outward Dialing Trunk Access...
Page 182: ...General Features 182 Features Guide User Manual References 4 3 69 Secret Busy Override...
Page 209: ...General Features Features Guide 209 User Manual References 4 3 62 Pickup Dialing Hot Line...
Page 297: ...General Features Features Guide 297 User Manual References 4 3 7 Background Music BGM...
Page 305: ...General Features Features Guide 305 User Manual References 4 3 71 Station Program Clear...
Page 348: ...General Features 348 Features Guide...
Page 349: ...ISDN Features Features Guide 349 Section 2 ISDN Features...
Page 368: ...ISDN Features 368 Features Guide...
Page 369: ...TIE Line Features Features Guide 369 Section 3 TIE Line Features...
Page 388: ...TIE Line Features 388 Features Guide...
Page 389: ...Features Guide 389 Section 4 Tones Ring Tones...
Page 392: ...Tone Ring Tone 392 Features Guide...
Page 393: ...Index Features Guide 393 Section 5 Index...
Page 397: ...Index Features Guide 397...
