Panasonic KXTA30820 Installation Manual - Page 94

C 3 Features Calling Party Control (CPC) Signal Detection Description The Calling Party Control (CPC) Signal is an on-hook indication (disconnect signal) sent from the outside (CO) line when the telephone is hung up at the other end. To maintain efficient utilization of outside (CO) lines, the system monitors their state and when a CPC Signal is detected from a line, the system disconnects the line and alerts the extension with a reorder tone. Conditions • CPC Signal Detection is enabled or disabled for incoming and outgoing outside calls by system programming. • Generally, CPC for Signal Detection works for incoming outside calls, and does not work for outgoing outside calls (except after they are placed on Call Hold or Exclusive Call Hold). In this case, if an extension user remains off-hook after an outgoing outside call is completed, the system will not release all the switches used to establish the connection. The connected outside (CO) line will continue to be in use. To prevent this, CPC Signal Detection can be programmed to work for outgoing outside calls. • If a CPC Signal is detected during a Conference call, the line will be disconnected and the remaining two parties can resume their call. • If a CPC Signal is detected during a call between a DISA caller and an extension or external party, the line will be disconnected. Programming References Section 4, System Programming [420] Calling Party Control (CPC) Signal [421] CPC Detection for Outgoing Calls Feature References None Operation References Not applicable. 3-38 Features