Table 2-15 T1 Led Indications; Figure 2-81 1Priu-C1 Led Indication Pattern Of Layer 1 On T1 Unit - NEC SL1000 Hardware Manual

ISSUE 1.0
T1 Alarm Mode
Refer to following figure for LED pattern information. LED indications for the T1 are listed in following
table.
120 ms
red
LOS
green
red
AIS
green
red
OOF
green
red
RAI
green

Figure 2-81 1PRIU-C1 LED Indication Pattern of Layer 1 on T1 Unit

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
Hardware Manual
1 cycle 3.8 sec (120ms x 32=3840 ms)

Table 2-15 T1 LED Indications

Details of the alarm The LED indication pattern
Following an alarm blink (red, green, red, green), a red
LED lighting up.
Following an alarm blink (red, green, red, green), a red
LED flashes on and off slowly twice
Following an alarm blink (red, green, red, green), a red
LED and a green LED flash on and off 3 times simultane-
ously.
Following an alarm blink (red, green, red, green), a green
LED flashes on and off twice.
SL1000
2-53