w. ® 13.1.7 PDN (Primary Directory Number)/SDN (Secondary Directory Number) Extension—SDN Key
mode, SDN Walking COS, and assigning SDN buttons through PT programming
Conditions
• Walking COS
Extension users can make a call from extensions of a less-privileged COS by using their own COS
temporarily. (® 20.1.1 Walking COS)
PC Programming Manual References
4.12 [2-7-1] Class of Service—COS Settings
6.1 [4-1-1] Wired Extension—Extension Settings—Main— COS
6.10 [4-2-1] Portable Station—Extension Settings—Main— COS
PT Programming Manual References
2.1.8 COS Programming
[602] Class of Service
Feature Manual References
21.1 Capacity of System Resources
3.1.24 CPC (Calling Party Control) Signal Detection
Description
The Calling Party Control (CPC) signal is an on-hook indication (disconnect signal) sent from an analog CO
line when the other party hangs up. To maintain efficient utilization of CO lines, the PBX monitors each line’s
status
and when CPC signal is detected on a line, the PBX disconnects the line and alerts the extension with
a reorder tone.
Conditions
• CPC signal detection is programmable for incoming CO line calls, and for outgoing CO line calls.
• If your telephone company sends signals similar to CPC, it is recommended not to enable CPC signal
detection on outgoing CO line calls.
• If CPC signal is detected during a conference call (® 3.1.19 Conference), the line is disconnected. The
remaining parties stay connected.
• If CPC signal is detected during a call between a caller using the Direct Inward System Access (DISA)
feature (® 4.1.8 DISA (Direct Inward System Access)) and an extension or an outside party, the line is
disconnected.
PC Programming Manual References
3.30 [1-1] Slot—Port Property - LCO Port—
CPC Signal Detection Time—Outgoing, Incoming
3.36 [1-1] Slot—Port Property - T1 Port
→ CPC Signal Detection (DID)—Outgoing, Incoming
→ CPC Signal Detection (LCO/GCO)—Outgoing, Incoming
72 Feature Manual Document Version 2013-05
3.1.24 CPC (Calling Party Control) Signal Detection
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