Allied Telesis AT-8400 Series Reference Manual page 76

Installing and Removing Line Cards
62
3. Remove the faceplate from the slot.
Keep the faceplate in a safe area. The faceplate is required on
unused slots to maintain proper airflow and to keep dust from
getting into the chassis.
4. Check the WAIT/REMOVE LED on the AT-8401 management card. See
Figure 32 below.
After you remove the faceplate, the WAIT/REMOVE LED on the
AT-8401 management card turns a steady amber. After
approximately 20 seconds, the WAIT/REMOVE LED turns a steady
green.
Caution
When the WAIT/REMOVE LED is steady amber, it is not safe to install
a line card. In this case, wait approximately twenty seconds until
the WAIT/REMOVE LED turns steady green before proceeding with
the installation procedure.
Figure 32 AT-8401 Management Card LEDs
M
A T - 8
4 0 1
R S - 2
3 2
T E R
M I N A
L
P O R
T
P W R
F L T
M G M
T
M S T
F A N R
A
W A I T
F A N
/
B
R E M
O V E
R E S
E T