Netgear 7200 Series Manuel d'utilisateur Page 127
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
User Manual for the NETGEAR 7200 Series Layer 2 Managed Switch Software
Cabling Guidelines A-3
202-10010-01
Table 8-1. Electrical Requirements of Category 5 Cable
Twisted Pair Cables
For two devices to communicate, the transmitter of each device must be connected to the receiver
of the other device. The crossover function is usually implemented internally as part of the
circuitry in the device. Computers and workstation adapter cards are usually media-dependent
interface ports, called MDI or uplink ports. Most repeaters and switch ports are configured as
media-dependent interfaces with built-in crossover ports, called MDI-X or normal ports. Auto
Uplink technology automatically senses which connection, MDI or MDI-X, is needed and makes
the right connection.
Figure 8-1 illustrates straight-through twisted pair cable.
Figure 8-1: Straight-Through Twisted-Pair Cable
SPECIFICATIONS CATEGORY 5 CABLE REQUIREMENTS
Number of pairs Four
Impedance 100 ± 15%
Mutual capacitance at 1 KHz 5.6 nF per 100 m
Maximum attenuation
(dB per 100 m, at 20° C)
at 4 MHz: 8.2
at 31 MHz: 11.7
at 100 MHz: 22.0
NEXT loss (dB minimum) at 16 MHz: 44
at 31 MHz: 39
at 100 MHz: 32
- User Manual for the 1
- NETGEAR 7200 Series Layer 1
- 2 Managed Switch Software 1
- Technical Support 2
- Trademarks 2
- Statement of Conditions 2
- Contents 5
- Chapter 1 15
- About This Guide 15
- Typographical Conventions 16
- Special Message Formats 16
- About This Guide 1-3 17
- How to Print this Manual 18
- Chapter 2 19
- Chapter 3 21
- Command Line Interface Syntax 21
- Parameters 22
- Conventions 23
- Annotations 24
- Chapter 4 25
- Chapter 5 29
- How to Log In to the GSM7224 30
- Interactive Switch Image 31
- System-Wide Popup Menus 32
- Port-Specific Popup Menus 32
- Chapter 6 33
- Quick Startup 33
- System Info and System Setup 34
- Port (when Slot value is 0): 35
- Quick Startup IP Address 36
- Quick Startup 6-5 37
- The types are: 38
- Address 39
- VLAN Configuration Example 40
- Solution 1 41
- Solution 2 41
- 6-10 Quick Startup 42
- Chapter 7 43
- Switching Commands 43
- 7-2 Switching Commands 44
- Switching Commands 7-3 45
- Switching Commands 7-5 47
- 7-6 Switching Commands 48
- Switching Commands 7-7 49
- 7-8 Switching Commands 50
- Switching Commands 7-9 51
- 7-10 Switching Commands 52
- Switching Commands 7-11 53
- 7-12 Switching Commands 54
- Management Commands 55
- 7-14 Switching Commands 56
- Switching Commands 7-15 57
- 7-16 Switching Commands 58
- Switching Commands 7-17 59
- 7-18 Switching Commands 60
- Switching Commands 7-19 61
- 7-20 Switching Commands 62
- Switching Commands 7-21 63
- 7-22 Switching Commands 64
- Device Configuration Commands 65
- 7-24 Switching Commands 66
- Switching Commands 7-25 67
- 7-26 Switching Commands 68
- Switching Commands 7-27 69
- 7-28 Switching Commands 70
- Switching Commands 7-29 71
- 7-30 Switching Commands 72
- Switching Commands 7-31 73
- 7-32 Switching Commands 74
- Switching Commands 7-33 75
- 7-34 Switching Commands 76
- Switching Commands 7-35 77
- 7-36 Switching Commands 78
- Switching Commands 7-37 79
- 7-38 Switching Commands 80
- Switching Commands 7-39 81
- 7-40 Switching Commands 82
- (MFDB) table 83
- 7-42 Switching Commands 84
- Switching Commands 7-43 85
- 7-44 Switching Commands 86
- Spanning Tree Commands 87
- 7-46 Switching Commands 88
- Switching Commands 7-47 89
- 7-48 Switching Commands 90
- Switching Commands 7-49 91
- 7-50 Switching Commands 92
- Switching Commands 7-51 93
- 7-52 Switching Commands 94
- Switching Commands 7-53 95
- 7-54 Switching Commands 96
- Switching Commands 7-55 97
- 7-56 Switching Commands 98
- Switching Commands 7-57 99
- Security Commands 100
- Switching Commands 7-59 101
- 202-10010-01 101
- 7-60 Switching Commands 102
- Switching Commands 7-61 103
- 7-62 Switching Commands 104
- Switching Commands 7-63 105
- 7-64 Switching Commands 106
- Switching Commands 7-65 107
- 7-66 Switching Commands 108
- Switching Commands 7-67 109
- 7-68 Switching Commands 110
- Switching Commands 7-69 111
- 7-70 Switching Commands 112
- Switching Commands 7-71 113
- 7-72 Switching Commands 114
- Switching Commands 7-73 115
- System Utilities 116
- Switching Commands 7-75 117
- Table 3. TFTP Upload Example 117
- 7-76 Switching Commands 118
- Switching Commands 7-77 119
- 7-78 Switching Commands 120
- Switching Commands 7-79 121
- 7-80 Switching Commands 122
- Chapter 8 123
- Differentiated Services 123
- 8-2 Differentiated Services 124
- Appendix A 125
- Cabling Guidelines 125
- Category 5 Cable 126
- Twisted Pair Cables 127
- Patch Panels and Cables 128
- Cabling Guidelines A-5 129
- Near End Cross Talk (NEXT) 130
- Patch Cables 130
- Cabling Guidelines A-7 131
- Conclusion 132
- Appendix B 133
- Glossary 133
- IP Multicasting 141
- Internet Protocol 141
- Learning 141
- Load balancing 141
- Wide Area Network 150
- ZTerm 4-2 158
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