NEC SL2100 - Page 92

ISSUE 4.0 SL2100
INSTALLING THE EXPANSION INTERFACE BOARDS 90
LOS
green
120 ms
green
green
green
AIS
OOF
RAI
1 cycle 3.8 sec (120 ms x 32 = 3840 ms)
Figure 2-72 Indication Pattern of Layer 1 on T1 Board
Table 2-20 T1 LED Indications
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 on.
LOS
AIS
OOF
RAI
TS16
1 cycle 3.8 sec (120 ms x 32 = 3840 ms)
green
green
green
green
green
120 ms
Figure 2-73 LED Indication Pattern of Layer 1 on E1 Board
Table 2-21 E1 LED Indications
Alarm
Details of the Alarm
The LED Indication Pattern
LOS
LOS (Loss of Signal (Red Alarm))
No Signal (Analog Interface)
Following an alarm blink twice (green), a green LED lighting
up.
Alarm
Details of the Alarm
The LED Indication Pattern
LOS
LOS (Loss of Signal (Red Alarm))
No Signal (Analog Interface)
Following an alarm blink twice (green), a green LED light up.
AIS
AIS (Alarm Indication Signal (Blue Alarm))
Following an alarm blink twice (green), a green LED flashes
on and off slowly twice
OOF
OOF (Out of Frame (Red Alarm))
Following an alarm blink twice (green), a green LED flash on
and off 3 times simultaneously.
RAI
RAI (Remote Alarm Indication (Yellow
Alarm))
Following an alarm blink twice (green), a green LED goes
off.
No alarm
System does LED control