AT-EX1001SC/GM1 Installation Guide
5
Port and System LEDs
The front panel has several LEDs that display the status of the ports and the
unit. Table 1 describes the functions of the LEDs.
Note
A valid port link is indicated only when both the SD and the PLL LOCK
LEDs are ON.
Table 1
AT-EX1001SC/GM1 LED Indicators
LED
Description
State
Indicates
System LEDs
PWR/
NMS
Power
Green
Extender is powered up and ready for
use.
LP/BACK
Loop Back
N/A
Not implemented.
Port LEDs
SD
Signal Detect
Green
Signal is present on this port.
PLL
LOCK
Phase Lock
Loop Lock
Green
Phase Lock Loop is locked on this
port.
