Allied Telesis AT-2911 Series Adapters - Manual (Page 21)

AT-2911 Series Gigabit Ethernet Network Adapters Installation and User’s Guide
21
Note
An SFP transceiver must be purchased separately. For a list of
supported transceivers, contact your Allied Telesis distributor or
reseller.
The SFP slot is shown in Figure 7.
Figure 7. SFP Slot
LEDs
The AT-2911 series adapter has an LED per port.
Table 1 describes the link states that the LED indicates.
Table 1. LED Status
State Description
On Valid link.
Off No link.
Flashing Data traffic is present between the adapter and the
switch.