1.11.10 Calling Party Control (CPC) Signal DetectionDescriptionThe Calling Party Control (CPC) signal is an on-hook indication (disconnect signal) sent from the analoguetrunk when the other party hangs up. To maintain efficient utilisation of trunks, the PBX monitors their stateand when CPC signal is detected from a line, disconnects the line and alerts the extension with a reorder tone.Conditions• CPC signal detection is programmable for incoming trunk calls, and for outgoing trunk calls.• If your telephone company sends other signals similar to CPC, it is recommended not to enable CPC signaldetection on outgoing trunk calls.• If a CPC signal is detected during a Conference call (® 1.14.1.2 Conference), that line is disconnected,but the remaining parties stay connected.• If a CPC signal is detected during a call between a caller using the DISA feature (® 1.17.6 Direct InwardSystem Access (DISA)) and an extension or an outside party, the line is disconnected.PC Programming Manual References3.27 [1-1] Slot—Port Property - LCO Port— CPC Signal Detection Time—Outgoing, Incoming3.35 [1-1] Slot—Port Property - T1 Port→ CPC Signal Detection (DID)—Outgoing, Incoming→ CPC Signal Detection (LCO/GCO)—Outgoing, Incoming3.41 [1-1] Slot—Port Property - E1 Port— CPC Detection Time—Out, In3.47 [1-1] Slot—Port Property - DID Port— CPC Detection Time—Out (DID), In (DID)PT Programming Manual References[413] LCOT CPC Signal Detection Time—Outgoing[414] LCOT CPC Signal Detection Time—Incoming168 Feature Guide1.11.10 Calling Party Control (CPC) Signal Detection
