Allied Telesis AT-FS970M/16F8-LC, Installation Manual, Page: 37 / 106

FS970M Series Installation Guide
37
SFP Slots
The switches have two slots for 100Mbps 100Base-FX or 1000Mbps
1000Base-SX/LX fiber optic transceivers. The transceivers can be used to
connect the switches to other network devices over large distances, build
a high-speed backbone network between network 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 web site.
The two SFP slots are paired with the two 10/100/1000Base-T ports. The
combo ports are listed in Table 9.
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 network 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 9. Combo Ports
Model
10/100/1000
Base-T Port
SFP Slot
AT-FS970M/8, AT-FS970M/8PS, and AT-FS970M/8PS-E 9R 9
10R 10
AT-FS970M/24C, AT-FS970M/24F,AT-FS970M/24LPS,
AT-FS970M/24PS, AT-FS970M/16F8-LC and
AT-FS970M/16F8-SC
25R 25
26R 26
AT-FS970M/48 and
AT-FS970M/48PS
49R 49
50R 50