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out adjustment, maintenance or repairs to this product. No installation, adjustment,
maintenance or repairs should be performed by either the operator or the user.
All extension slots are not hot-swappable
Before operating modules in the electricity conditions, please be noticed that optical
modules shall be connected with optical fiber wires or shield with optical module cover for
fear that laser light harms to operator's eyes.
1.2.
Handling Energized Products
1.2.1
General Safety Practices
Do not touch or tamper with the power supply when the power cord is connected. Line
voltages may be present inside certain products even when the power switch (if installed)
is in the OFF position or a fuse is blown. For DC-powered products, although the voltages
levels are usually not hazardous, energy hazards may still exist.
Before working on equipment connected to power lines or telecommunication lines,
remove jewelry or any other metallic object that may come into contact with energized
parts.
Unless otherwise specified, all products are intended to be grounded during normal use.
Grounding is provided by connecting the mains plug to a wall socket with a protective
earth terminal. If an earth lug is provided on the product, it should be connected to the
protective earth at all times, by a wire with a diameter of 18 AWG or wider. Rack-mounted
equipment should be mounted only in earthed racks and cabinets.
Always make the ground connection first and disconnect it last. Do not connect
telecommunication cables to ungrounded equipment. Make sure that all other cables are
disconnected before disconnecting the ground.
1.2.2
Connection of AC Mains
Make sure that the electrical installation complies with local codes.
Always connect the AC plug to a wall socket with a protective ground.
Always connect the power cord first to the equipment and then to the wall socket. If a
power switch is provided in the equipment, set it to the OFF position. If the power cord
cannot be readily disconnected in case of emergency, make sure that a readily accessible
circuit breaker or emergency switch is installed in the building installation.
1.2.3
Connection of DC Mains
Unless otherwise specified in the manual, the DC input to the equipment is floating in
reference to the ground. Any single pole can be externally grounded.
Due to the high current capability of DC mains systems, care should be taken when
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