User's Manual

AT-9000 Gigabit Ethernet Switch Installation Guide
32
SFP Slots
The AT-9000/12POE, AT-9000/28, AT-9000/28POE, and AT-9000/28SP
switches have four slots for 100Mbps 100Base-FX or 1000Mbps
1000Base-SX/LX fiber optic transceivers. The transceivers can be used to
connect the switches to other host devices over large distances, build a
high-speed backbone network between host devices, or connect high-
speed devices, such as servers, to your network.
The switches support a variety of short and long distance, 100 and 1000
Mbps fiber optic SFP modules. For a list of supported SFP modules,
contact your Allied Telesis representative or visit our website.
On the AT-9000/28, AT-9000/28POE, and AT-9000/28SP switches, the
four SFP slots are paired with the four 10/100/1000Base-T ports. The
combo ports are listed in Table 3.
The rules for using the combo ports are listed here:
 Only one port in a combo pair is active at a time.
 The twisted-pair port is the default active port.
 The SFP slot becomes active when an SFP transceiver
establishes a link to another network node.
 The twisted-pair port of a combo pair remains deactivated so long
as the SFP transceiver has a link to another host device.
 The switch automatically reactivates the twisted-pair port if the
companion SFP module loses its network link.
 The twisted-pair port and SFP module of a combo port share the
same settings, such as VLAN assignments, access control lists,
and spanning tree.
Table 3. Combo Ports
10/100/1000
Base-T Port
SFP Slot
25R 25
26R 26
27R 27
28R 28