Huawei NE05E Hardware Manual page 429

HUAWEI NE05E,NE08E
Hardware Guide
When router equipment is installed in an outdoor cabinet, do not install other
type of equipment in the cabinet. If other type of equipment and router
equipment have to be installed in the same outdoor cabinet, make sure that the
equipment satisfies requirements for heat dissipation and anti-erosion.
When installed in environment C, the equipment needs to be installed in an
outdoor cabinet with an air conditioner or heat exchanger, which keeps the
equipment fully isolated from the outside environment. Environment C involves
the following cases:
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An area close to a pollution source refers to an area where saline water is within 3.7 km away
from it, where a heavy pollution source is within 3 km away from it, where a medium pollution
source is within 2 km away from it, or where a light pollution source is within 1 km away from
it.
Selection of the Outdoor Cabinet
When selecting an outdoor cabinet, mainly consider the factors such as capacity,
parts performance, protection performance, engineering installation performance,
ventilation, and heat dissipation. These factors help to select a reliable outdoor
cabinet at the initial stage of network device deployment to ensure that the device
runs reliably.
An outdoor cabinet is mainly installed in an outdoor area or an indoor area close
to contamination sources, such as an underground garage. Its EMC and noise must
comply with standards. When an ONU is running, the outdoor cabinet must
ensure that the noise is lower than 7 dB to avoid disturbing residents.
Space of the Outdoor Cabinet
The space of the outdoor cabinet in different configurations must meet the
requirements of terminal block layout and the space for routing FE network
cables, power cables, E1 cables and optical fibers. For the requirements of the
cable routing space, see
surge protection and Grounding of the Outdoor Cabinet
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Issue 05 (2023-03-31)
Outdoor area close to a pollution source
Environment with only simple shields such as awnings
Place on the sea
NO TE
Cabling
The electrical continuity between parts of the outdoor cabinet must be
satisfactory to provide reliable grounding, safety, and protection performance.
Ensure that the resistance between any two connected points is less than 0.1
ohm. You can use a multimeter to measure the resistance.
Surge protection devices are required to be installed near the outdoor cabinet
for AC/DC power cables directly connected to the outdoor cabinet. The surge
protection rating must not be smaller than 20 kA (8/20 μs). The signal cable
connected to the outdoor cabinet needs to be connected to the surge
protection board on an outdoor cabinet.
The MDF must have protective units installed and the surge protection rating
must not be smaller than 1 kA (8/20 μs).
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4 Hardware Installation and Parts Replacement
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