User's Manual

2-9
Cisco Catalyst 490 0M Switch Ins talla tion Guid e
78-18350-02
Chapter 2 Site Planning
Site Planning Checklist
Preventing Elect rostatic Disch arge Damage
Electrostatic discharge (ESD) damage occurs when electronic cards or components are improperly
handled and can result in complete or intermittent failures. Follow these guidelines to prevent ESD
damage:
• Always use an ESD-preventive wrist or ankle strap, and ensure that it makes maximum contact with
the skin.
• When coming into contact with any internal components, always use a wrist strap connected to on e
of the following:
– ESD wrist strap connector
– Any unpainted grounded surface on the chassis or equipment r ack
Caution P eriodically check the res istance val ue of the antistatic strap. The me asurement should be between 1 and
10 megohms (Mohms).
• Handle cards by t he ed ges onl y.
• Avoid contact between the modules and clothing. The wrist strap protects only the card from ESD
voltages on the body; ESD voltages on cl othing can still cause damage.
Site Planning Checkli st
Table 2-2 lists the site planning activities that you should perform before you install the Catalyst 4900M
switch. Completing each activity helps to ensure a successful switch installation.
Tabl e 2-2 Site Planning Ch ecklist
Task N o. Planning Activity Verified By Ti m e Date
1 Space evaluation:
Space and layout
Floor covering
Shock and vibration
Lighting
Maintenance access
2 Environmental evalua tion:
Ambient temperature
Humidity
Altitude
Atmospheric contamination
Airflow
3 Power evaluation:
Input power type
Receptacle proximity to the equipment
Dedicated (separate) circui ts for redundant power
supplies
UPS for powe r failur es