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Cisco MGX 8950 Hardware Installation Guide
Release 3, Part Number 78-14147-02 Rev. A0, November 2002
Chapter 2 Preparing for Installation
Safety Requirements
Follow these guidelines to prevent ESD damage:
• Always use an ESD grounding strap and ensure that it makes good skin contact. Put the strap on
before handling any cards or modules.
• Connect the equipment end of the strap to the rack or to the ESD jack located in your chassis.
• When you install a component, use available ejector levers or captive installation screws to properly
seat the bus connectors in the backplane or midplane. These devices prevent accidental removal,
provide proper grounding for the system, and help ensure that bus connectors are properly seated.
• When you remove a component, use available ejector levers or captive installation screws to release
the bus connectors from the backplane or midplane.
• Handle the cards and modules by the edges only; avoid touching the printed circuit boards or
connectors.
• Place a removed board component-side-up on an antistatic surface or in a static-shielding
container.
If you plan to return the component to the factory, immediately place it in a
static-shielding
container.
• Avoid contact between the printed circuit boards and clothing. The wrist strap protects components
from ESD voltages on the body only; ESD voltages on clothing can still cause damage.
The building where you are working should provide adequate grounding to prevent damage from
electrostatic discharge. For additional information, refer to the appropriate hardware installation guide
for your switch.
Caution Periodically check the resistance value of the antistatic strap. Ensure that the measurement is between 1
and 10 megohms.
The antistatic wrist strap kit consists of a strap, a coiled cord, and a clip for holding the strap. We
recommend that you install the base of the antistatic wrist strap cable on the left front flange of one of
the units at a convenient height. Complete the following steps to attach the antistatic wrist strap:
Step 1 Use a front mounting screw and a screwdriver to secure the ring lug to the flange and front rail. The other
end of the cord connects to the strap with a snap connector.
Step 2 Peel the back off the clip to expose the adhesive surface and attach the clip to the front of the unit above
the ring lug.
Step 3 Mount the clip sideways so that the strap does not interfere with the removal of cards. Use the clip to
store the strap.
General Maintenance Guidelines
This section covers the following topics:
• Installation and Replacement Suggestions, page 2-9
• Hot Swapping Cards and Modules, page 2-9
• Card Installation Guidelines, page 2-9