Installation Guide

Maintenance Safety
When you perform maintenance procedures on Extreme Networks equipment, follow these
recommendations:
• Use only authorized accessories or components approved for use with this system. Failure to follow
these instructions may damage the equipment or violate required safety and EMC regulations.
• This system contains no customer serviceable components. Do not attempt to repair a chassis,
power supply, module, or other component. In the event of failure, return the defective unit to
Extreme Networks for repair or replacement, unless otherwise instructed by an Extreme Networks
representative.
• To remove power from the system, you must unplug all power cords from wall outlets. The power
cord is the disconnect device to the main power source.
• Disconnect all power cords before working near power supplies, unless otherwise instructed by a
product-specific maintenance procedure.
• Replace a power cord immediately if it shows any signs of damage.
• When you work with optical devices, power supplies, or other modular accessories, put on an ESD-
preventive wrist strap to reduce the risk of electronic damage to the equipment. Connect the other
end of the strap to an appropriate grounding point on the equipment rack or to an ESD jack on the
chassis if one is provided. Leave the ESD-preventive wrist strap permanently attached to the
equipment rack or chassis so that it is always available when you need to handle components that
are sensitive to ESD.
• Install all cables in a manner that avoids strain. Use tie wraps or other strain relief devices.
Fiber Optic Ports and Optical Safety
The following safety warnings apply to all optical devices used in Extreme Networks equipment that are
removable or directly installed in an I/O module or chassis system.
Such devices include but are not limited to gigabit interface converters (GBICs), small form factor
pluggable (SFP) modules (or mini-GBICs), QSFP+ modules, XENPAK transceivers, and XFP laser optic
modules.
Warning
Laser optic modules become very hot after prolonged use. Take care when removing a laser
optic module from the module or option card. If the laser optic module is too hot to touch,
disengage the laser optic module and allow it to cool before removing it completely.
When working with laser optic modules, always take the precautions listed below to avoid
exposure to hazardous radiation.
• Never look at the transmit LED/laser through a magnifying device while the transmit LED is powered
on.
• Never look directly at a fiber port on the switch or at the ends of a fiber cable when they are
powered on.
• Invisible laser radiation can occur when the connectors are open. Avoid direct eye exposure to the
beam when optical connections are unplugged.
• Never alter, modify, or change an optical device in any way other than suggested in this document.
Maintenance Safety
Safety and Regulatory Information
150 ExtremeSwitching 5520 Series Hardware Installation Guide