Allied Telesis AT-8288XL/SC - Manual (Page 24)

Hardware Description
24
Expansion Module Slots
The two expansion slots on the front panel of the switch can
accommodate a wide range of optional 10/100Base-TX, 100Base-FX,
1000Base-SX, 1000Base-LX, and 1000Base-T expansion modules. You
can use the modules to interconnect distant network devices, build a
high-speed backbone network, or attach additional nodes to the switch.
Note
For a list of the expansion modules supported by the switch and
the AT-S24 management software, contact your Allied Telesyn sales
representative or download a copy of the AT-S24 release notes
from the Allied Telesyn web site.