Interpreting LEDs

LED

Color State must be...

4 Red 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

Off

Your E1/PRI line requires CRC4. Select

 

 

 

 

the CRC4 option. (See Setting Up ISDN

 

 

 

 

Port Properties on page 80.)

 

 

 

 

 

On

Off

Off

Off

Your E1/PRI line requires CRC4. Select

 

 

 

 

the CRC4 option. (See Setting Up ISDN

 

 

 

 

Port Properties on page 80.)

 

 

 

 

 

Off

Off

Off

Off

Either no electrical signal is on the

 

 

 

 

E1/PRI line, or your ISDN provider is

 

 

 

 

sending an AIS alarm to the board.

 

 

 

 

Make sure your cable is plugged in

 

 

 

 

correctly.

 

 

 

 

 

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Interphase Corporation