Huawei USG6000 Series Hardware Manual page 415

HUAWEI USG6000 Series
Hardware Guide
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To reduce as much interference as possible, complete the following steps:
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Issue 08 (2017-06-30)
Common impedance (including the PGND system) coupling
Take effective measures to avoid possible power grid interference to the power supply
system.
Do not use the power line ground or lightning protection ground as the working ground
of the device, and leave as much space as possible between the working ground of the
device and the power line ground or lightning protection ground.
Ensure that no high-power radio transmitter, radar transmitter, or high-frequency high-
current device is deployed nearby.
Take electromagnetic protection measures if necessary.
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