B
3
Features
3-20
Features
B
utton, Loop-CO (L-CO)
Description
All outside lines can be assigned to a flexible CO button on a
proprietary telephone (PT). The assigned button serves as a Loop-
CO (L-CO) button. An incoming call on any outside line arrives at
the L-CO, unless there is a Single-CO (S-CO) button associated
with the line or unless the button is already in use. To make an
outside call, the PT user simply press the dedicated L-CO button.
Conditions
• No L-CO button is originally provided on a PT. A flexible CO button
can be assigned as an L-CO button in either System or Station
Programming.
• It is possible to assign more than one L-CO button on a PT.
• Pressing the L-CO button provides the same operation as dialing an
automatic line access code. This results in Automatic Line Access or
Automatic Route Selection (ARS), if programmed.
• Immediate, delayed, no ringing or no incoming call (disable) can be
selected on an extension–outside line basis.
• The digital PT user can choose a desired ringer frequency for each L-
CO button by System or Station Programming.
Programming References
Section 4, System Programming
[005] Flexible CO Button Assignment
[400] Outside Line Connection Assignment
[603]–[604] DIL 1:N Extension and Delayed Ringing — Day / Night
[605]–[606] Outgoing Permitted Outside Line Assignment — Day /
Night
Station Programming.......................................................User Manual
Flexible Button Assignment – Loop-CO (L-CO) Button
Ringing Tone Selection for CO Buttons
Feature References
Section 3, Features
Answering, Direct Outside Line
Line Access, Direct
LED Indication, Outside Line
Ringing, Delayed
Line Access, Automatic
Ringing Tone Selection for CO
Buttons
Operation References
Basic Operation
—User Manual
Making Calls
Receiving Calls
DPT Features
Outward Dialing – Line Access, Automatic