Compliance and Safety Manual
H3C VG 10-10/10-11 Voice Gateway Chapter 3 Safety Information
3-2
Safety Symbol Description
Electric shock symbol: To suggest a danger of high voltage
Microwave symbol: To suggest a high-intensity
electromagnetic field
Laser symbol: To suggest a strong laser beam
Safety precautions are classified into the following levels: Danger, Warning, Caution
and Note.
Danger: Suggests the possibility of a fatal accident or body injury if safety precautions
are ignored.
Warning: Suggests the possibility of a major accident or severe injury, or equipment
damage, if safety precautions are ignored.
Caution: Suggests the possibility of a severe injury, or equipment damage, if safety
precautions are ignored.
Note: Suggests the possibility of an injury or equipment damage, if safety precautions
are ignored
3.1.2 General Requirements In order to reduce the technically unavoidable residual risk to a minimum, it is
imperative to follow the rules below:
z Read all the instructions before operation.
z Do not block ventilation openings while the system is on, and keep at least 5 cm
distance from ventilation openings and walls or other things which may block the
openings
z To reduce the risk of fire, use only No. 26 AWG or larger telecommunication line
cord
z No operation can be done on the device and cables when lightning.
z To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to
telephone-network voltage (TNV) circuits.
z For safety It is not recommended to wear jewelry and watch during operation on
device.
z Installation, configuration and disassembly must be done only by skillful personnel
according to the documents concerned.
z The unit/system must be operated by experts and authorized users only.
z 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.