1.18 Proprietary Telephone (PT) Features
Feature Guide 221
1.18.3 LED Indication
Description
The LED (Light Emitting Diode) of the Message/Ringer Lamp and following buttons (Line Status Buttons
and Corresponding Extension Status Button) show line conditions with a variety of light patterns.
Line Status Buttons: S-CO, G-CO, L-CO, INTERCOM, ICD Group
Corresponding Extension Status Button: DSS
1. Light Pattern of the Message/Ringer Lamp
[DPT]
• Incoming call from a trunk: Red flashing
• Incoming call from another extension: Green flashing
• Message(s) present (no incoming call): Red on
• No message(s) present (no incoming call): Off
[APT]
• Incoming call: Red flashing
• Message(s) present (no incoming call): Red on
• No message(s) present (no incoming call): Off
2. Light Pattern of the Line Status Buttons
Light Pattern
Line Status Button
Trunk Status
Intercom Line
Status
Incoming Call
Distribution
Group Line
Status
S-CO G-CO L-CO INTERCOM ICD Group
Off Idle
Green on This extension is using the line.
Slow green
flashing
This extension is holding the line.
Moderate green
flashing
This extension is holding the line using Exclusive Hold or using the line for an Unattended
Conference.
Rapid green
flashing
Incoming call/
Privacy
Release
Incoming call
Red on Incoming call
for another
extension/
Another
extension is
using the line/
Another
extension has
the line on
Exclusive Hold.
Other
extensions are
using all trunks
in the trunk
group.
— This extension is
logged out of the
incoming call
distribution group.