H3C SecPath F5020 Installation Manual

Also see for SecPath F5020: Configuration guide Installation, quick start Manual Interface configuration guide

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H3C SecPath F5020 Installation Manual Manual pdf 59 page image

52Appendix E CablesConsole cableA console cable is an 8-core shielded cable, with a crimped RJ-45 connector at one end forconnecting to the console port of the switch, and a DB-9 female connector at the other end forconnecting to the serial port on the console terminal.Figure 31 Console cableTable 28 Console cable connectionRJ-45 Signal Direction DB-91 RTS ← 72 DTR ← 43 TXD ← 34 CD → 15 GND - 56 RXD → 27 DSR → 68 CTS → 8Ethernet twisted pair cableIntroductionAn Ethernet twisted pair cable consists of four pairs of insulated copper wires twisted together. Everywire uses a different color, and has a diameter of about 1 mm (0.04 in). A pair of twisted coppercables can cancel the electromagnetic radiation of each other, and reduce interference of externalsources. An Ethernet twisted pair cable mainly transmits analog signals and is advantageous intransmitting data over shorter distances. It is the commonly used transmission media of the Ethernet.The maximum transmission distance of the Ethernet twisted pair cable is 100 m (328.08 ft). Toextend the transmission distance, you can connect two twisted pair cable segments with a repeater.At most four repeaters can be added, which means five segments can be joined together to providea transmission distance of 500 m (1640.42 ft).Ethernet twisted pair cables can be classified into category 3, category 4, category 5, category 5e,category 6, and category 7 cables based on performance. In LANs, category 5, category 5e, andcategory 6 are commonly used.