DPT Overview
User Manual 31
Group-CO (G-CO) button
To support efficient utilization of outside lines, a group of outside lines (outside line group) can
be assigned to a CO button. This button is referred to as Group-CO (G-CO) button. Any
incoming calls from any outside line in the same trunk group arrive at the G-CO button. To
make a outside call, you can access an idle outside line in the trunk group by simply pressing
the assigned G-CO button.
Conditions
• It is possible to assign the same outside line to an S-CO button, a G-CO button, and an L-
CO button.
• It is necessary to program the extension for making and/or receiving calls in outside line
groups.
• When your extension is assigned as an incoming call destination for a outside line, you
cannot receive any incoming outside calls unless a G-CO, L-CO or S-CO button associated
with the outside line is assigned.
User Manual References
2.2.2 Flexible Button Assignment
4.3.64 Outward Dialing, Line Access — SUMMARY
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 are S-CO or G-CO buttons associated with the line or unless the
button is already in use. To make a 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.
User Manual References
2.2.2 Flexible Button Assignment
4.3.64 Outward Dialing, Line Access — SUMMARY
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