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Preventing ESD
Preventing ESD
Note
Installing, Servicing, or Disposing the System
Cisco VG248 Analog Phone Gateway Hardware Installation Guide
2-6
Electrostatic discharge (ESD) damage occurs when electronic cards or
components are mishandled and can result in complete or intermittent failures.
Note the following guidelines before you install or service the system:
Always wear an ESD-preventive wrist or ankle strap when handling
•
electronic components. Connect one end of the strap to an ESD jack or an
unpainted metal component on the system (such as a captive installation
screw).
Handle cards by the faceplates and edges only; avoid touching the printed
•
circuit board and connector pins.
Place any removed component on an antistatic surface or in a static shielding
•
bag.
Avoid contact between the cards and clothing. The wrist strap only protects
•
the card from ESD voltages on the body; ESD voltages on clothing can still
cause damage.
For safety, periodically check the resistance value of the antistatic strap. The
measurement should be between 1 and 10 megohms (Mohms).
Disconnect all power and external cables before installing the system.
•
Install the system in compliance with your local and national electrical codes:
•
–
United States: National Fire Protection Association (NFPA) 70; United
States National Electrical Code.
–
Canada: Canadian Electrical Code, Part I, CSA C22.1.
Other countries: If local and national electrical codes are not available,
–
refer to IEC 364, Part 1 through Part 7.
Do not work alone under potentially hazardous conditions.
•
Do not perform any action that creates a potential hazard to people or makes
•
the equipment unsafe.
Chapter 2
Preparing to Install the VG248
78-13154-01
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