Power Failure Transfer (408E-A1 Only); General; Figure 2-82 1Priu-C1 Led Indication Pattern Of Layer 1 On E1 Unit - NEC SL1000 Hardware Manual

SL1000
120 ms
red
LOS
green
red
AIS
green
red
OOF
green
red
RAI
green
red
TS16
green

Figure 2-82 1PRIU-C1 LED Indication Pattern of Layer 1 on E1 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))
TS16 TS16 (Receive Time Slot 16 all Alarm)
No alarm System does LED control

3.5 Power Failure Transfer (408E-A1 only)

3.5.1 General

In the event of AC power failure, the specified trunks are directly connected to the specified extension
ports as below. And SLT must be connected to the specified extension. The multiline telephone (4W)
does not work when connected to the specified extension port.
Trunk Port No. 5 Extension Port No. 16
Trunk Port No. 9 Extension Port No. 24
Trunk Port No. 13 Extension Port No. 32
2-58
1 cycle 3.8 sec (120ms x 32=3840 ms)
Table 2-16 E1 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.
An alarm blink repeat twice by 1 cycle.
ISSUE 3.0
Installation