Allied Telesis AT-8288XL/SC - Manual (Page 47)

AT-8216FXL, AT-8224XL, and AT-8288XL Installation Guide
47
Network Cabling Problems
If you have 10/100Base-TX (Fast Ethernet), some network problems may
be related to exceeding cabling distances. Refer to the standard IEEE
802.3u, Clause 29.3.1.2 on Worst Case Path Delay Value. This
document specifies that the collision domain diameter must be within
the following limits:
# Under 100 meters (328 feet) for TX cabling
# Under 412 meters (1,331.56 feet) for half-duplex FX cabling