Calling Party Control (Cpc) Signal Detection - Panasonic KX-TDA50 Features Manual

1.10 Conversation Features
[DPT + DPT]
• Available Telephones
KX-T7600 series (except KX-T7640)
• Digital XDP connection enables the maximum number of DPTs that the PBX supports to be increased.
This increase is only available when (1) an MEC card is installed and (2) an additional AC adaptor is
connected.
• The following features cannot be used on either the master or slave DPT:
a)
OHCA: A call waiting tone will be heard even if the OHCA feature is set.
b)
USB Module: The DPTs will not function properly if a USB Module is attached to either DPT. Do
not connect a USB Module to either of the DPTs.
Note
To cancel a Digital XDP connection, disconnect the slave DPT from the master, then disconnect and
reconnect the master DPT to the PBX.
[DPT + DPT + SLT]
• When an SLT is connected to the slave DPT in parallel mode, the SLT acts as a parallel extension of
the master DPT. If connected in XDP mode, the SLT acts as an independent extension.
Installation Manual References
2.6.2 Parallel Connection of the Extensions
2.6.3 Digital EXtra Device Port (Digital XDP) Connection
User Manual References
1.7.10 Paralleled Telephone

1.10.10 Calling Party Control (CPC) 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 (→ LCOT CPC Signal Detection
Time—Incoming [414]), and for outgoing CO line calls (→ LCOT CPC Signal Detection Time—
Outgoing [413]).
• 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 (→ 1.13.1.2 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 (→ 1.15.6 Direct Inward System Access (DISA)) and an extension or an outside party, the line
is disconnected.
100 Feature Guide