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Appendix E Cables
This chapter describes the cables used for connecting network ports.
Table 1 Cable description
Cable Ports
connected
Application
Console cable
Console port at one end and
9-pin serial port at the other
end
Enables users to perform debugging,
configuration, maintenance, management,
and software loading on the device.
USB console cable
USB console port at one end
and USB port at the other end
RJ-45 Ethernet ports
Connects RJ-45 Ethernet ports to transmit
data.
SFP+/SFP/QSFP+/QSFP28
ports
Connects the fiber ports to transmit data.
SFP+ ports
Connects SFP+ ports to transmit data.
QSFP+ ports
Connects QSFP+ ports to transmit data.
QSFP+ port at one end, and
SFP+ port at the other end
Connects a QSFP+ port to an SFP+ port.
Ethernet twisted pair cable
An Ethernet twisted pair cable consists of four pairs of insulated wires twisted together. It mainly
transmits analog signals and is advantageous in transmitting data over shorter distances. The
maximum transmission distance is 100 m (328.08 ft).
RJ-45 connector
An Ethernet twisted pair cable connects network devices through the RJ-45 connectors at the two
ends.
shows the pinouts of an RJ-45 connector.
Figure 1 RJ-45 connector pinout diagram
Cable pinouts
EIA/TIA cabling specifications define two standards: 568A and 568B for cable pinouts.
PIN #8
PIN #1