Interphase Tech iSPAN 5535 PRI - Manual (Page 91)

Chapter 7: Troubleshooting
iSPAN PRI PCI ISDN Users Guide 71
In their operational state, the LEDs must be as follows:
The following table describes the adapter status when the
sequence of LEDs appears as follows:
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 Adapter is operational.
On Off On Off Your E1/PRI line requires CRC4. Select
the CRC4 option. (See Setting Up ISDN
PRI Port Properties on page 56.)
On Off Off Off Your E1/PRI line requires CRC4. Select
the CRC4 option. (See Setting Up ISDN
PRI Port Properties on page 56.)
Off Off Off Off Either no electrical signal is on the
E1/PRI line, or your ISDN provider is
currently sending an AIS alarm to the
adapter.
Make sure your cable is plugged in
correctly.