Allied Telesis Support Portal

2450FT slow throughput via Fiber port

Why is the Fiber port significantly slower on the AT-2450FT than the Copper port?

The AT-2450FT Network Adapter (NIC) over the fiber optic cable only works at 10Mb Half-Duplex.

Since fiber cannot Auto-Negotiate we recommend that you change the Speed and Duplex of the Switch or Hub to match the network card's Advanced Properties that are located on the Advanced tab after double clicking on the AT-2450FT adapter listed in Network Control Panel.