Panasonic KX-TD500 System Reference Manual page 242

2.08 Single CO (SCO)
Description
To support prompt handling of outside calls, a CO
line 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 Single CO (SCO) button.
SCO button feature provides easy access to the
CO lines for extension users who make and
receive many outside calls.
The PITS telephone user can access a CO line
by simply pressing the SCO button without
dialing the CO line access code, and an incoming
outside call can be directed to the PITS
telephone via dedicated SCO button without
assistance of the Operator.
In addition, the associated status LED provides
busy/idle status and the busy to idle reminder.
SCO button can be used either one-way service
(Incoming Only or Outgoing Only) or two-ways
service (Both-Way).
The SCO button and the CO Line Status
The following table shows the behavior of the DN
button programmed as Single CO and the CO
line status:
Indicator
Off Idle
Lights green I-use
Green 60 wink I-hold
Green 120 wink I-exclusive hold, consultation hold,
unattended conference
Green 240 wink Incoming call (DIL 1: 1)
Lights red Other-use, exclusive hold
Red 60 wink Other-hold*
Red 120 wink Privacy release possible
Red 240 wink Incoming call (DIL 1: N)
* When you hold the CO line which is assigned to
another PITS as SCO and make the outgoing
call by using the PDN button, SCO buttons
lights in red.
CO Line Status
3-D-24
Programming
System Programming
"Extension-Station (2/4,3/4)",
Type and Number
Conditions
• When you press the SCO button which lights in
red by using another user, the "Automatic
Callback to Trunk" feature works. Refer the
Section 4-C-6.01 "Automatic Callback to Trunk"
for details.
• The Single CO button indicator will light in red
in the following circumstances.
<1> When the Single CO is not In Service
<2> Idle status and Single CO in Busy Out
status
<3> Idle status and Single CO in trunk route
control status
When the Single CO button is pressed in
any of these statuses, its indicator lights up
green but busy tone is heard.
• In the following cases, the Single CO button
indicator remains lit green and reorder tone is
sent.
<1> When Calling Party Control signal has
been detected during a call using the
Single CO.
<2> When outgoing restriction applies to an
outgoing call made from the Single CO.
• You cannot assign the CO line as the SCO
button which belongs to the trunk group type
"DID".
Reference
VT Dumb
11-C-26.00
10-G-1.02
10-G-1.03