Allied Telesis AT-9448Ts/XP (Basic Layer 3) - Manual (Page 31)

AT-9400 Series Gigabit Ethernet Switches Installation Guide
31
Note
These guidelines do not apply to the SFP slots on the
AT-9408LC/SP Switch and the XFP slots on the AT-9424Ts/XP and
AT-9448Ts/XP Switches.