Installation ManualH3C SecPath F1000-S Firewall Chapter 3 Hardware Installation3-6Figure 3-5 Ethernet cable assemblyNote:In making network cables, shielded cables are preferred for the sake ofelectromagnetic compatibility.2) Cables for optical Ethernet interfacesFor an optical Ethernet interface, you can choose the appropriate fiber cable, singlemode or multimode, depending on the 1000Base-FX SFP optical transceiver you areusing (see Table 1-6 for fiber options). Because all the available optical transceiversuse LC optical connectors, you must use the fiber cable with LC fiber connectors. Allthe optical transceivers are hot-swappable.Note:A fiber connector, as defined by the International Telecommunications Union (ITU), is apassive component that connects two or more fiber cable segments stably but notpermanently. Fiber connectors are indispensable to an optical communication system,making it possible to connect and disconnect optical channels.Following are several fiber connector types:z FC: A round optical connector with screw threadsz ST: A round plug-in optical connectorz SC: A square optical connectorz MT-RJ: A square optical transceiverz LC: A compact optical connector developed by LucentNote:The fiber cable selection depends on SFP module. You must specify the desired SFPmodules when you purchase a firewall. Otherwise, the fiber cable is not provided.