Interpreting LEDs

E1/PRI Interface With CRC4

On cards with an E1/PRI interface and CRC4 (most European countries other than France), the LEDs for each port function as follows:

LED

Color

Meaning if the LED is ON...

 

 

 

1

Green

Clock is synchronized.

 

 

 

2

Green

Physical layer is active.

 

 

 

3

Yellow

Your ISDN provider is sending an RAI alarm to the

 

 

board.

 

 

 

4

Red

Error: CRC4 not found.

 

 

 

In their operational state, the LEDs are as follows:

LED

Color State must be...

1 Green On

2 Green On

3Yellow Off

4Red Off

The following table describes the board status when the sequence of LEDs appears as follows:

LED1

LED2

LED3

LED4

Meaning

 

 

 

 

 

On

On

Off

Off

Board is operational.

 

 

 

 

 

On

Off

On

On

Your E1/PRI line does not support

 

 

 

 

CRC4 functionality. Deselect the CRC4

 

 

 

 

option. (See Setting Up ISDN Port

 

 

 

 

Properties on page 80.)

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Interphase Corporation