The FLEX and FLEX Link are designed to work with UTP cabling. We recommend use of Cat5 or better cabling for installation of the FLEX. However, this does not mean the FLEX will not work on cabling that does not meet Cat5 specifications.
Also 2 mini-GBIC ports: 1000 Base-TX/SX/LX/EX/ZX/LHX (determined by SFP, transceiver module installed),
Ethernet IEEE 802.3z, fiber optic cable (NVT Phybridge Fiber Modules Available) .
FLEX 24 FLEX-Link