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Features 3-11
3 Features B
Button, Group-CO (G-CO)
Description To support efficient utilization of outside (CO) lines, a group of
outside (CO) lines (outside (CO) line group) can be assigned to a
CO button. The function is referred to as Group-CO (G-CO). Any
incoming call from any outside (CO) line in the outside (CO) line
group arrives at the G-CO button. To make an outside call, the user
can access an idle outside (CO) line in the group by simply pressing
the assigned G-CO button.
Conditions • A G-CO button is not originally provided on a proprietary telephone
(PT). It can be programmed on a CO button by station programming.
• The extension for receiving and/or originating calls on outside (CO)
lines must be programmed.
• The same outside (CO) line group can be assigned to more than one G-
CO button on the same PT.
• The same line can be assigned to a Single-CO (S-CO) button and a
G-CO button.
• Immediate, delayed, no ringing or no incoming call (disable) can be
selected on an extension-outside (CO) line basis.
• Users can choose a desired ringing pattern for each outside (CO) line by
system programming.
Programming References
Section 4, System Programming
[400] Outside (CO) Line Connection Assignment
[404] Outside (CO) Line Group Assignment
[405]–[407] Flexible Outward Dialing Assignment — Day/Night/Lunch
[408]–[410] Flexible Ringing Assignment — Day/Night/Lunch
[411]–[413] Delayed Ringing Assignment — Day/Night/Lunch
[423] Outside (CO) Line Ringing Pattern Selection
Station Programming RRRRRRRRRR User Manual
Flexible Button Assignment – Group-CO (G-CO) Button
Feature References Section 3, Features
Answering, Direct Outside (CO) Line Ringing, Delayed
LED Indication, Outside (CO) Line Ringing Pattern Selection for
Line Access, Outside (CO) Line Group Intercom Calls and Outside
Outside (CO) Line Group (CO) Lines
Operation References Basic Operations
— User Manual Making Calls
Receiving Calls
Telephone Features
Answering, Direct Outside (CO) Line
Outward Dialing – Line Access, Automatic, Outside (CO) Line Group