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Appendix D Cables
This chapter describes cables used for connecting network ports.
Table 31 Cable description
Cable Port t
yp
e
A
pp
lication
Ethernet twisted pair cable RJ-45 Ethernet ports Connects RJ-45 Ethernet ports to transmit data.
Optical fiber SFP/XFP ports Connects the fiber ports to transmit data.
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).
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, and
category 6 are commonly used.
Table 32 Ethernet cable description
T
yp
e Descri
p
tion
Category 5 Transmits data at a maximum speed of 100 Mbps.
Category 5e Transmits data at a maximum speed of 1000 Mbps.
Category 6 Transmits data at a speed higher than 1 Gbps.
Based on whether a metal shielding is used, Ethernet twisted pair cables can be classified into shielded
twisted pair (STP) and unshielded twisted pair (UTP). An STP cable provides a metallic braid between the
twisted pairs and the outer jacket. This metallic braid helps reduce radiation, prevent information from
being listened, and eliminate external electromagnetic interference (EMI) of external sources. STPs have
- H3C SecPath F5000-A5 Firewall 1
- Preface 3
- GUI conventions 4
- Symbols 4
- Network topology icons 4
- Port numbering in examples 4
- Obtaining documentation 5
- Technical support 5
- Documentation feedback 6
- Contents 7
- Preparing for installation 11
- Laser safety 12
- Handling safety 12
- Weight support 12
- Temperature and humidity 13
- Cleanness 13
- Cooling 14
- ESD prevention 14
- Lightning protection 16
- Rack installation 16
- Accessories 17
- Installing the firewall 20
- Mounting bracket 22
- Grounding the firewall 25
- Attaching the ring terminal 26
- Installing an MPU 27
- Installing a CF card 29
- Installing a fan tray 31
- Installing a power module 33
- Connecting interface cables 34
- Connecting Ethernet cables 35
- Connecting a power cord 36
- Connecting a DC power cord 37
- Verifying the installation 39
- Installing FRUs 40
- Required tools 42
- Installation procedure 42
- Installation precautions 43
- (3) Console cable 46
- Powering on the firewall 50
- Configuring services 55
- Configuring NAT 58
- Replacement procedures 61
- Removing a filler panel 62
- Installing a filler panel 63
- Replacing an MPU 64
- Replacing a CF card 67
- Replacing a power module 69
- Replacing a fan tray 70
- NOTE: 72
- Managing combo interfaces 77
- Rebooting your firewall 79
- Task Command 80
- Troubleshooting 81
- Service module failures 82
- Power supply system failures 83
- Fan failures 84
- Console port failure 85
- Password loss 86
- Cooling system failures 86
- Software upgrade failures 87
- Solution 88
- Symptom 88
- Chassis views 90
- Main processing unit 91
- Interface modules 92
- Power modules 93
- Fan tray 94
- Technical specifications 95
- NSQ1XP20 98
- Appendix B LEDs 101
- Interface module LEDs 103
- NSQ1GT8P40 104
- Power module LEDs 105
- Fan tray LEDs 106
- Arranging slots 107
- Numbering interfaces 107
- Examples 108
- Appendix D Cables 109
- Optical fiber 113
- Precautions 114
- General cabling requirements 115
- Cabling examples 118
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