H3C Technologies H3C SecPath F5000-S Firewall - Manual (Page 75)

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Appendix C Cables
Console cable
A console cable is an 8-core shielded cable, with a crimped RJ-45 connector at one end for connecting
to the console port of the switch, and a DB-9 female connector at the other end for connecting to the
serial port on the console terminal.
Figure 46 Console cable
Table 34 Console cable connection
RJ-45 Signal Direction DB-9
1 RTS ← 7
2 DTR ← 4
3 TXD ← 3
4 CD → 1
5 GND - 5
6 RXD → 2
7 DSR → 6
8 CTS → 8
Ethernet twisted pair cable
Introduction
An Ethernet twisted pair cable consists of four pairs of insulated copper wires twisted together. Every
wire uses a different color, and has a diameter of about 1 mm (0.04 in). A pair of twisted copper cables
can cancel the electromagnetic radiation of each other, and reduce interference of external sources. An
Ethernet twisted pair cable mainly transmits analog signals and is advantageous in transmitting 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). To extend 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 provide a transmission distance of 500
m (1640.42 ft).