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Interpreting LEDs
120 Interphase Corporation
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:
In their operational state, the LEDs are as follows:
The following table describes the board status when the
sequence of LEDs appears 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.
LED Color State must be...
1 Green On
2 Green On
3 Yellow Off
4 Red Off
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.)