Compliance and Safety Manual
H3C VG 20-16/20-32 Voice Gateway
Chapter 3 Safety Information
3-3
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The plug-socket combination must be accessible at all times because it serves as
the main disconnecting device.
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To reduce the risk of fire, use only No. 26 AWG or larger telecommunication line
cord
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No operation can be done on the device and cables when lightning.
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To enhance the lightning protection capability of the power supply, a lightning
arrester is recommended at the input end of the power supply.
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To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to
telephone-network voltage (TNV) circuits.
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For safety It is not recommended to wear jewelry and watch during operation on
device.
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Installation, configuration and disassembly must be done only by skillful personnel
according to the documents concerned.
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The unit/system must be operated by experts and authorized users only.
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Any replacement or change to the system or parts of the system (including the
software) must be done by qualified or authorized personnel of Huawei-3Com.
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Any fault and error that might affect safety must be reported immediately by the
user to the person in charge.
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Removal or disabling of safety facilities, troubleshooting, and maintenance of the
equipment must be done by qualified specialists only.
All parts of the document must be followed to the full. The document also serves as a
guide to the selection of measuring and test equipment.
3.2 Electricity Safety
3.2.1 High Voltage
Danger:
High voltage power supply offers electric power for equipment operation. Direct contact
or indirect contact (via damp objects) with high voltage and AC mains supply may result
in fatal danger.
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During the installation of AC power supply facility, the local safety regulations must
be followed. The personnel who install the AC facility must be qualified for high
voltage and AC operations.
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Conducting articles, such as watch, hand chain, bracelet and ring are prohibited
during the operation.
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When water is found in the rack, or the rack is damp, please immediately switch off
the power supply.
