Power Failure Transfer (4Coidb-B1 Only); General; Table 2-17 T1 Led Indications; Figure 2-78 1Priu-C1 Led Indication Pattern Of Layer 1 On T1 Unit - NEC SL1100 Hardware Manual

ISSUE 1.0
LED Indication
Live LED (D4) Busy LED (D3)
(Green) (Red)
Off On
Off
Flash 80ms
(On/Off) x3/
400ms Off
T1 Alarm Mode
Refer to following figure for LED pattern information. LED indications for the T1 are listed in
Table 2-17 T1 LED Indications on this
120 ms
red
LOS
green
red
AIS
green
red
OOF
green
red
RAI
green

Figure 2-78 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

3.5 Power Failure Transfer (4COIDB-B1 only)

3.5.1 General

In the event of AC power failure, the specified trunk is directly connected to the specified extension
port as below. And SLT must be connected to the specified extension. The multiline telephone (2W)
does not work when the specified trunk is connected to the specified extension port.
J2 (CO1-4): Trunk Port 1
Refer to Table 2-13 RJ-61 CO/PF Pin-Outs (J2, J3) on page 2-48
phone.
• The connected extension must be SLT (Single Line Telephone).
Hardware Manual
Operation Status
Unit Busy A Channel is busy (use another
from Ch1 - Chx)
All channels are Idle.
Downloading firmware
page.
1 cycle 3.8 sec (120ms x 32=3840 ms)

Table 2-17 T1 LED Indications

Details of the alarm
J3 (PF1): Extension Port 1
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.
for wiring of the power failure tele-
SL1100
Remarks
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2-51