# Status indicator LEDs

The CG 6565 board contains three types of LEDs:

- Trunk LEDs

- Ethernet LEDs

- Board LEDs

## Trunk LEDs

The CG 6565 board has two-color LED indicators (yellow or red) to indicate the status of each trunk.

### Four-trunk version

The trunk status LEDs on the end bracket of the four-trunk version of the board are shown in the following illustration:

### Eight-trunk version

The location of the LEDs on the eight-trunk version of the board is shown in the following illustration:

The following tables describes the trunk LED indicators:

LED | Description
Red | Loss of frame, loss of signal, or bit error rate.
Yellow | Remote loss of frame, or remote loss of signaling multiframe.
Not lit | Trunk is not configured, or the trunk is not in alarm.

No trunk LEDs are illuminated if the NetworkInterface.T1E1[x].Type keyword is set to NONE.

For more specific diagnostic information about the current state of trunk synchronization, run the NaturalAccess trunk monitoring utility trunkmon. Refer to the Dialogic® NaturalAccess™ OAM System Developer’s Manual for more information about trunkmon.

## Ethernet LEDs

The CG 6565 board provides LEDs, as shown in the following illustration, to indicate the status of each Ethernet interface:

LED | Description
--- | ---
SPEED | Data rate of the Ethernet link.
Data Rate | LED
10 Mb | Off
100 Mb | On
1000 Mb | Blinking
This LED is used only when a reliable Ethernet connection has been established. The ACTIVITY LED is on.
ACTIVITY | There is activity on the Ethernet link. When the Ethernet has established link integrity, and there is transmit or receive activity on the link, the LED flickers on.

## Board LEDs

The CG 6565 board provides a green, yellow, and red LED, as shown in the following illustration, to indicate the board status.

The board status LEDs provide the following indications:

LED | Description
Green only, blinking slowly | Board booted successfully and is running.
Red only | Fatal software error.
Red and yellow | Board is resetting.
Red, yellow, and green | Board resets are released.
Yellow and green | Boot loader has started.
Not lit | Power is off or the hardware is starting up.