Allied Telesis AT-2972T/2 - Manual (Page 115)

AT-29xx Series Gigabit Ethernet Adapters Installation Guide
115
Checking Port LEDs on the Adapter
The adapter has two LEDs: LINK and ACT. The LINK LED indicates an
active link and the ACT (Activity) LED indicates data transfer status. Once
the driver is loaded and the cables are connected properly. The LINK LED
is lit and the ACT LED is on if data traffic is present.
Before the port LEDs can provide troubleshooting information, the adapter
must be connected to the network (see Chapter 2, “Installing the
Hardware” on page 21) and the network drivers for your particular
operating system must be installed.
1. Verify that the adapter driver software has been installed and that the
adapter is connected to a network.
2. Check to see that the LEDs operate as described in Table 6.
Table 6. Fiber Optic Port LED Status
LED State
Description
LINK On Valid fiber link.
Off No fiber link.
ACT Blinking Data traffic is present
between the card and the
switch.
Off Data traffic is not present.