Table 2-25 E1 Led Indications; Figure 2-76 Led Indication Pattern Of Layer 1 On E1 Board - NEC SL2100 Hardware Manual

ISSUE 1.0
E1 Alarm Mode
Refer to following figure for LED pattern information. LED indications for the E1 are listed in
Table 2-25 E1 LED Indications on page
120 ms
LOS
green
AIS
green
OOF
green
RAI
green
TS16
green

Figure 2-76 LED Indication Pattern of Layer 1 on E1 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))
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.
Hardware Manual
2-59.
1 cycle 3.8 sec (120 ms x 32 = 3840 ms)

Table 2-25 E1 LED Indications

Details of the Alarm The LED Indication Pattern
Following an alarm blink twice (green), a green LED lighting
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.
An alarm blink repeat twice by 1 cycle.
SL2100
2-59