NEC SL1000 - Figure 2-81 1 PRIU-C1 LED Indication Pattern of Layer 1 on T1 Unit; Table 2-15 T1 LED Indications; Table 2-16 E1 LED Indications

LED Indication
Operation Status Remarks
Live LED (D4)
(Green)
Busy LED (D3)
(Red)
Off On Unit Busy A Channel is busy (use another
from Ch1 - Chx)
-
Off All channels are Idle. -
Flash 80ms (On/
Off) x3/ 400ms
Off
Downloading firmware -
T1 Alarm Mode
Refer to following figure for LED pattern information. LED indications for the T1 are listed in
Table 2-15 T1 LED Indications on page 2-57.
LOS
red
120 ms
green
red
green
red
green
red
green
A
IS
OOF
RAI
1 cycle 3.8 sec (120ms x 32=3840 ms)
Figure 2-81 1PRIU-C1 LED Indication Pattern of Layer 1 on T1 Unit
Table 2-15 T1 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 (red, green, red, green), a red
LED lighting up.
AIS AIS (Alarm Indication Signal (Blue
Alarm))
Following an alarm blink (red, green, red, green), a red
LED flashes on and off slowly twice
OOF OOF (Out of Frame (Red Alarm)) Following an alarm blink (red, green, red, green), a red
LED and a green LED flash on and off 3 times simultane-
ously.
RAI RAI (Remote Alarm Indication (Yellow
Alarm))
Following an alarm blink (red, green, red, green), a green
LED flashes on and off twice.
No alarm System does LED control
E1 Alarm Mode
Refer to following figure for LED pattern information. LED indications for the E1 are listed in
Table 2-16 E1 LED Indications on page 2-58.
ISSUE 3.0
SL1000
Hardware Manual 2-57