Interphase Tech RAS Communications Controller 5536 - Manual (Page 138)

Interpreting LEDs
118 Interphase Corporation
Interpreting LEDs
The 5536-DM RAS board provides four LEDs above each PRI
port:
Figure 8-1. LED Arrangement
LED functions differ depending on whether the board is
configured with a T1/PRI interface, an E1/PRI interface with
CRC4, or an E1/PRI interface without CRC.
T1/PRI Interface
On cards with a T1/PRI interface, 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.
LED1
LED2
LED3
LED4