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1.19 Proprietary Telephone (PT) Features
Feature Guide 177
1.19.3 LED Indication
Description
The light (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