NEC SL2100 Hardware Manual page 93

ISSUE 4.0
Alarm
AIS
AIS (Alarm Indication Signal (Blue Alarm))
OOF OOF (Out of Frame (Red Alarm))
RAI RAI (Remote Alarm Indication (Yellow
Alarm))
TS16 TS16 (Receive Time Slot 16 all Alarm)
No alarm System does LED control
The order of priority is set up to alarm in the order LOS → AIS → OOF → RAI → TS16.
INSTALLING THE EXPANSION INTERFACE BOARDS
Details of the Alarm The LED Indication Pattern
Following an alarm blink twice (green), a green LED flashes
on and off slowly twice
Following an alarm blink twice (green), a green LED flash on
and off 3 times simultaneously.
Following an alarm blink twice (green), a green LED goes
off.
An alarm blink repeat twice by 1 cycle.
SL2100
91