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1-16 DPT Overview
1.1 Configuration
Line Access Buttons
The following two types of CO buttons must be used to seize an outside line when
making a call.
• Loop-CO (L-CO) button
• Single-CO (S-CO) button
Conditions
• A flexible CO button can be assigned as a Line Access Button (L-CO or S-CO) in
either System/Station Programming. Once a flexible CO button is assigned as a Line
Access Button, it provides the line status condition by lighting patterns and color
indication. Please refer to “LED Indication” in this section.
• Incoming and outgoing calls on the line are shown on the button in the following
priority.
S-CO > L-CO
Loop-CO (L-CO) button
All outside lines can be assigned to a flexible CO button on a proprietary telephone. The
assigned button serves as an L-CO button. An incoming call on any outside line arrives
at the L-CO button, unless there is S-CO button associated with the line or unless the
button is already in use. To make an outside call, you simply press the dedicated L-CO
button. Pressing the L-CO button provides the same operation as dialing an automatic
line access code.
Programming References
• Station Programming (Section 2)
Flexible CO Button Assignment — Loop-CO (L-CO) Button
(System Programming — [005] (Installation Manual) can be used for this assignment.)
Feature References
Flexible CO Buttons (Section 1.1/Configuration)
Outward Dialing, Line Access — Line Access, Automatic