Panasonic KX-DT521 Quick Reference Manual page 14

Light
Pattern
Slow red
flashing
Rapid red
flashing
For information on the light patterns of PDN and SDN buttons, refer to 2.9.1 Primary Directory Number
(PDN)/Secondary Directory Number (SDN) Extension.
3.
Light Pattern of the Corresponding Extension Status Button
Light Pattern
Off
Red on
Rapid red flashing
*1 Only when Call Pickup by a DSS button is disabled.
*2
Only when Call Pickup by a DSS button is enabled.
4.
Flashing Light Patterns
Slow Flashing
Moderate Flashing
Rapid Flashing
Conditions
•
The incoming call shows on the buttons in the following priority:
ICD Group®S-CO®G-CO®L-CO®PDN®INTERCOM
•
The light pattern of a DSS button for incoming call can be set to "Off" through system programming. In this
case, the DSS button light will not indicate the status of the corresponding extension.
Trunk Status
S-CO G-CO
Another
extension is
holding the
line.
Incoming call to the incoming call distribution
group in Ring distribution method
Idle
Busy/Incoming call
Incoming call
1 s
Line Status Button
L-CO
—
Corresponding Extension Status Button (DSS)
/DND for trunk calls
*1
*2
2.21.3 LED Indication
Incoming
Call
Intercom
Distribution
Line Status
Group Line
Status
INTERCOM ICD Group
—
Feature Guide 255