l The main function of the upper cable manager is to clearly separate cables of each slot
from each other so that cables can be routed in order and cables in one slot do not affect
the insertion or removal of the board in the neighboring slot.
l The main function of the lower cable manager is to bear optical fibers.
1.2.9 Grounding
This topic describes the grounding principle of the N66E-18 cabinet and the position of the
ground point.
NOTICE
Connect the ground cables properly to guarantee protection against lightening and
interference for the N66E-18 cabinet.
The power input end of the N66E-18 cabinet has a noise filter. The center ground of the noise
filter connects to the cabinet, called the cabinet ground, that is, the protection ground. Ground
the cabinet securely so that the influence electricity, leakage electricity can flow to the
ground, improving the protection against electromagnetic interference.
Use a ground cable to connect the ground point of the cabinet to the ground bar of the
telecommunications room or to the ground directly. It is recommended that the grounding
resistance of the telecommunications room should be less than 10 ohms. Refer to the local
standards to ground the cabinet.
The ground point of the cabinet is on the top of the cabinet, as shown in Figure 1-40.
SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Hardware Description
1 Cabinet
Issue 24 (2018-07-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
47
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