Allied Telesis AT-2912T - Manual (Page 17)

Secure Ethernet Network Adapter Installation and User’s Guide
17
The difference between the two adapters is their cable length
requirements. The AT-2712FX/SC is designed for multimode operation
using cables of up to in 275 meters (902 feet) in length. The AT-2712LX20/
SC adapter is designed for single mode operation using cables of up to 10
kilometers (6.123 miles) in length. For more information about the cables,
see Table 3 on page 33.
AT-2712FX/SC and AT-2712LX20/SC Adapters Physical Descriptions
The faceplate on the AT-2712FX/SC and AT-2712LX20/SC adapters
provides two fiber optic connectors for attaching the adapter to a
compatible link partner. See Figure 2 for an illustration of the adapter’s
faceplate.
Both the AT-2712FX/SC and AT-2712LX20/SC adapters have one fiber
port and one LED, as shown in Figure 2 and described in Table 1.
Figure 2. AT-2712FX/SC Faceplate
Table 1. Fiber Optic Port 100 LED Status
State Description
Green The port is operating at 100 Mbps and has a valid
link.
Flashing The port is receiving or transmitting network packets
at 100 Mbps.
1484
T
100
TX
RX
100