3. LEDs
3-2
October 2002 4200-A2-GN20-10
LED Meanings
When power is first applied to the unit, it performs a power-on self-test. When this
test is successfully completed, the Status LED blinks. The meaning of all the LEDs
is shown in Table 3-1, Front Panel LEDs.
Table 3-1. Front Panel LEDs
LED Color State Meaning
ALARM Amber Off
On
Blinking
No Alarms.
At least one major or critical alarm has been
detected.
At least one minor or automatic message alarm
has been detected. No major or critical alarms
have been detected.
DSL Port
(1–24)
Green Off
On
Blinking
The port is disabled or no signal is detected on
the line.
The port has successfully trained with the remote
and is active.
The port is attempting to train.
STATUS Green Off
On
Blinking
No power.
The unit has power and has completed
initialization and the self-test.
Normal operation.
TEST Amber Off
On
Normal operating mode. No disruptive tests are
active in the system.
At least one disruptive test is active in the
system.
UPLINK
1
Green Off
On
Blinking
The link is disabled, or no physical connection
exists.
The link is up.
An ATM alarm is occuring on the uplink.
1
For an IMA group connection, the UPLINK LED goes off when that group
connection is down. However, if any link in the group goes down, the UPLINK LED
blinks.
