SMC Networks 6152PL2 - annexe 1, Руководство по установке

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4-6
Making Network Connections
4
Note: For link spans exceeding 70 km, you may need to use premium single mode fiber
or dispersion shifted single mode fiber.
100 Mbps Fast Ethernet Collision Domain
10 Mbps Ethernet Collision Domain
Cable Labeling and Connection Records
When planning a network installation, it is essential to label the opposing ends of
cables and to record where each cable is connected. Doing so will enable you to
easily locate inter-connected devices, isolate faults and change your topology
without need for unnecessary time consumption.
To best manage the physical implementations of your network, follow these
guidelines:
• Clearly label the opposing ends of each cable.
• Using your building’s floor plans, draw a map of the location of all
network-connected equipment. For each piece of equipment, identify the devices
to which it is connected.
• Note the length of each cable and the maximum cable length supported by the
switch ports.
• For ease of understanding, use a location-based key when assigning prefixes to
your cable labeling.
• Use sequential numbers for cables that originate from the same equipment.
• Differentiate between racks by naming accordingly.
• Label each separate piece of equipment.
• Display a copy of your equipment map, including keys to all abbreviations at each
equipment rack.
Table 4-4 Maximum 1000BASE-ZX Gigabit Ethernet Cable Length
Fiber Size Fiber Bandwidth Maximum Cable Length Connector
9/125 micron
single-mode fiber
N/A 70 m - 100 km (43 ft - 62
miles)
LC
Table 4-5 Maximum Fast Ethernet Cable Length
Type Cable Type Max. Cable Length Connector
100BASE-TX Category 5 or better 100-ohm UTP or STP 100 m (328 ft) RJ-45
Table 4-6 Maximum Ethernet Cable Length
Type Cable Type Max. Cable Length Connector
10BASE-T Twisted Pair, Categories 3, 4, 5 or better
100-ohm UTP
100 m (328 ft) RJ-45