Transition Networks
SM24T6DPA Web User Guide
33664 Rev. B
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18
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1000BASE-T Cable Requirements
When adding hubs to your network, please note that because switches break up the path for
connected devices into separate collision domains, you should not include the switch or
connected cabling in your calculations for cascade length involving other devices.
All Category 5 UTP cables that are used for 100BASE-TX connections should also work for
1000BASE-T, providing that all four wire pairs are connected. However, it is recommended
that for all critical connections, or any new cable installations, Category 5e or Category 6
cable should be used. The Category 5e and 6 specifications include test parameters that are
only recommendations for Category 5. Therefore, the first step in preparing existing Category
5 cabling for running 1000BASE-T is a simple test of the cable installation to be sure that it
complies with the IEEE 802.3-2005 standards
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. This will allow user 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.
