H3C SecPath F5030 Installation Manual

Also see for SecPath F5000-A: Configuration guide Manual Manual

Contents

H3C SecPath F5030 Installation Manual Manual pdf 59 page image

52Appendix C CablesConsole cableA console cable is an 8-core shielded cable with a crimped RJ-45 connector at one end and a DB-9female connector at the other end. The RJ-45 connector is for connecting to the console port of thefirewall, and the DB-9 female connector is for connecting to the serial port on the configurationterminal.Figure 39 Console cableTable 37 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.