NEC SL2100 Hardware Manual page 92

ISSUE 4.0
LOS
green
AIS
green
OOF
green
RAI
green
Figure 2-72 Indication Pattern of Layer 1 on T1 Board
Alarm
LOS
LOS (Loss of Signal (Red Alarm))
No Signal (Analog Interface)
AIS AIS (Alarm Indication Signal (Blue Alarm))
OOF OOF (Out of Frame (Red Alarm))
RAI RAI (Remote Alarm Indication (Yellow
Alarm))
No alarm System does LED control
The order of priority is set up to alarm in the order LOS → AIS → OOF → RAI.
E1 Alarm Mode
Refer to following figure for LED pattern information. LED indications for the E1 are listed in
Table 2-21 E1 LED Indications
LOS
green
AIS
green
OOF
green
RAI
green
TS16
green
Figure 2-73 LED Indication Pattern of Layer 1 on E1 Board
Alarm
LOS
LOS (Loss of Signal (Red Alarm))
No Signal (Analog Interface)
INSTALLING THE EXPANSION INTERFACE BOARDS
120 ms
1 cycle 3.8 sec (120 ms x 32 = 3840 ms)
Table 2-20 T1 LED Indications
Details of the Alarm
on.
120 ms
1 cycle 3.8 sec (120 ms x 32 = 3840 ms)
Table 2-21 E1 LED Indications
Details of the Alarm
The LED Indication Pattern
Following an alarm blink twice (green), a green LED light up.
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.
The LED Indication Pattern
Following an alarm blink twice (green), a green LED lighting
up.
SL2100
90