Allied Telesis AT-A19 - Manual (Page 12)

Overview
6
For example, if you install an AT-A17 in slot B while leaving slot A empty,
the switch will assign the port numbers 25 and 26 to the ports on the
module. If you later install another AT-A17 in slot A, the switch will
automatically reallocate port numbers 25 and 26 to the new modules in
slot A and assign the port numbers 27 and 28 to the module in slot B. If
the module in slot B had been a member of a VLAN, you would be
required to reconfigure the VLAN to reflect the change to its port
numbers.
3. Remove the expansion module from the packing material. Make sure you
observe ESD precautions.
4. Slide the expansion module into the empty slot making sure the board is
aligned properly with the card guides. Refer to Figure 7.
Figure 7 Installing an Expansion Module
5. Secure the expansion module to the switch by tightening the captive
screws.
6. Apply power to the switch by re-attaching the power cord to the switch.
Verify that the Power LED lights green.
7. Remove the dust cover from the port(s) on the expansion module and
connect the data cable(s).
A
B
AT-A17
100BASE-FX/SC
RX
TX
RX
TX LINK
ACTIVITY
FULL DUP
HALF DUP COL
LINK
ACTIVITY
FULL DUP
HALF DUP
COL
1
2
Board
Card Guide
Dust Covers