TFIE Indication LEDs
From Zenitel Wiki
LEDs in Front Panel - ECPIR-3P Call Panel, EX-, Industrial- and Light Industrial Stations

- Power (Green): Steady light when power is OK
- Fault (Yellow): Flashing when the station is not registered/no connection to server
- Call (Red): Steady light during a conversation/call
LEDs in Function Keys/DAK keys
When a station is used in ICX-AlphaCom mode, the LEDs in the DAK keys can be controlled from the Event Handler by using the IND command.
Status LEDs on PCB

Two LEDs (green and red) indicates if the station is registered.
- Flashing 3 green: The station is successfully registered to the server/controller
- Flashing 2 red + 1 green: The station has no connection to the server/controller.
- Flashing 1 red + 2 green: The station is connected but NOT registered to the server/controller.
Ethernet Activity & Speed LEDs on PCB

Green LED:
- Steady light: Ethernet connection OK
- Flashing: Ethernet data traffic
- No light: No Ethernet connection
Yellow LED:
- Steady light: 100 Mbit Ethernet connection
- No light: 10 Mbit Ethernet connection
