EXFO FTB-8500 Series for FTB-500 - Manual (Page 473)

Specifications
Ethernet and Fibre Channel Application 459
Ethernet Electrical Interfaces
Ethernet Cables
Minimum Category 3 cable is required for 10Base-T connection while
Category 5 cable is required for 100Base-TX and 1000Base-T connections.
Maximum cable length (between two nodes) for 10Base-T, 100Base-TX, or
1000Base-T connection is 328 feet (100 meters).

Straight Through Cable (10/100 Mbps)
An Unshielded Twisted Pair (UTP) straight through cable is required to
connect a 10Base-T/100Base-TX Ethernet and Fibre Channel
Application port to a layer 1 or 2 device (ex: HUB, switch).

Crossover Cable (10/100 Mbps)
An Unshielded Twisted Pair (UTP) crossover cable is required to
connect the 10Base-T/100Base-TX Ethernet and Fibre Channel
Application port to a layer 3 device (ex: router).