Huawei CloudEngine 7800 Series Hardware Description page 181

CloudEngine 7800&6800&5800 Series Switches
Hardware Description
Item
Cabling
system
bandwidth
Table 5-7 Intervals between cable ties
Diameter of a Network Cable
Bundle (mm)
< 10
10-30
> 30
Issue 16 (2015-08-26)
Category 7
STP
600 MHz
NOTE
The cabling
system
exceeds the
requirement
s for IEEE
10GBASE-
T
performanc
e.
NOTE
l In a new built equipment room, Category 6A shielded twisted pairs or Category 7 twisted pairs are
recommended. These cables can avoid alien crosstalk while having no special installation requirements.
In addition, they can be used with other types of cables.
l If Category 6 shielded or unshielded twisted pairs are used in an equipment room and the cabling
systems can meet requirements of TSB-155, follow these rules route these cables:
l Separate these cables with other types of cables. If they must be routed in the same cable trough
with other types of cables, separated them from other cables using a metal plate.
l Separate cables as much as possible at the outlet and keep the cables parallel with each other. Most
alien crosstalk appears within 20 m away from the outlet. To reduce alien crosstalk, do not bundle
cables in the first 5 m to 20 m.
l If cables need to be bundled, bundle cables with cable ties placed every 150 mm to 300 mm. See
Table 5-7. Bundle cables loosely, as shown in
l You are advised to add no more than 12 cables in a bundle. A bundle cannot have more than 24
cables.
l Replace Category 6 connectors with Category 6A connectors.
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Category Category
6A STP 6A UTP
500 MHz
NOTE
The cabling system exceeds the
requirements for IEEE
10GBASE-T performance.
Figure
Interval Between Cable Ties (mm)
150
200
300
Category 6 Category 6
STP UTP
250 MHz
NOTE
Category 6 is specified only to
250 MHz. The cabling system
must be certified to 500 MHz
according to TSB-155 to help
ensure 10GBASE-T
compliance.
5-13.
5 Cables
171