Panasonic KX-TD500, System Reference Manual

Page: 433 / 1574

3.05 GCO Button
Description
To support efficient utilization of CO lines, a
group of CO lines (trunk group) can be assigned
to a DN button on a PITS telephone.
When this function is assigned, a DN button on a
PITS serves as the Group CO (GCO) button.
GCO button feature provides better service with
a given number of CO lines.
To make an outside call, a PITS telephone user
can access an idle CO line in the group by simply
pressing the dedicated GCO button.
The following table shows the behavior of the DN
button programmed as Group CO and the CO
line status:
Programming
Indicator
Off
Lights green
Green 60 wink
Green 120 wink
Green 240 wink
Lights red
Red 60 wink
Red 120 wink
Red 240 wink
CO Line Status
Free CO line in trunk group and no
incoming CO call
I-use
I-hold
I-exclusive hold, consultation hold,
unattended conference
CO line receiving an incoming call
(except for DIL 1:N)
No idle CO lines in trunk group
and no incoming call in trunk
group
—
—
CO line receiving an incoming call
(DIL 1:N only)
Conditions
• Pressing a Group CO button when it is red
serves to set the “Automatic Callback to Trunk”
function.
See Section 4-C-6.01 “Automatic Callback-
Trunk” for details.
• In the following cases, the Group CO button
indicator remains green and reorder tone is
sent.
<1> When Calling Party Control signal has
been detected during a call using the
Group CO.
<2> When outgoing restriction applies to an
outgoing call made from a Group CO.
• You cannot assign the CO line as the GCO
button which belongs to the trunk group type
“DID”.
System Programming
Reference
VT Dumb
“Extension-Station (2/4, 3/4)”,
Type and Number
11-C-26.00 10-G-1.02
10-G-1.03
4-B-9