100BASE-TX Network
2-2 Network Requirements
100BASE-TX NetworkFixedfrontpanelportsofthe4H4282‐49,4H4283‐49,4H4203‐72,and4H4202‐72 providea
connectionthatsupportsCategory5UTPcabling.Thedeviceattheotherendofthe
twistedpairsegmentmustmeetIEEE802.3‐2002100BASE‐TXFastEthernetnetwork
requirementsforthedevicestooperateat100Mbps.RefertotheCablingGuidefordetails.
100BASE-FX Fiber-Optic NetworkThe4H4284‐49DFE‐Goldmoduleprovides48portsthatsupport100Mbpsmultimode
fiber‐opticconnectivitythrough48fixedfront‐panelMT‐RJconnectors,whichsupport
100BASE‐FXfiber‐opticcabling.Thedeviceattheotherendofthefiber‐opticsegment
mustmeet100BASE‐FXFastEthernetnetworkrequirementsforthedevicestooperateat
100 Mbps.IEEE802.3u100BASE‐FXcharacteristicsforMultimodeFiberisasegment
lengthof412 meters(switchedport)inhalfduplex,2kilometers(swit chedport)infull
duplex.Thisdistancewillbeconsiderablyshorterfromarepeaterport.Makesureto
checkyournetworkdiameterspecifications.RefertotheCablingGuidefordetails.
Note: The fixed ports of the module support Category 5 UTP cabling with an impedance
between 85 and 111ohms for 100 Mbps operation.
The module is capable of operating at either 10 or 100 Mbps. The module automatically
senses the speed of the other device and adjusts its speed accordingly.