Installing a Fan-Speed Controller in Cisco 3620 Routers 5
Preventing Electrostatic Discharge Damage
If an electrical accident occurs, proceed as follows:
•Use caution; do not become a victim yourself.
•Turn OFF power to the router.
•If possible, send another person to get medical aid. Otherwise, determine the condition of the
victim and then call for help.
•Determine if the victim needs rescue breathing or external cardiac compressions; then take
appropriate action.
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. ESD can occur
when printed circuit cards are improperly handled and can result in complete or intermittent failures.
Always follow ESD prevention procedures when removing and replacing cards. Ensure that the
router chassis is electrically connected to earth ground. Wear an ESD-preventive wrist strap,
ensuring that it makes good skin contact. Connect the clip to an unpainted surface of the chassis
frame to safely channel unwanted ESD voltages to ground. To guard against ESD damage and
shocks, the wrist strap and cord must be used properly. If no wrist strap is available, ground yourself
by touching the metal part of the chassis.
Caution For safety, periodically check the resistance value of the antistatic strap, which should be between
1 and 10 megohms (Mohm).
FCC Class B Compliance
The equipment described in this document generates and may radiate radio-frequency energy. If it
is not installed in accordance with Cisco’s installation instructions, it may cause interference with
radio and television reception. This equipment has been tested and found to comply with the limits
for a Class B digital device in accordance with the specifications in part 15 of the FCC rules. These
specifications are designed to provide reasonable protection against such interference in a residential
installation. However, there is no guarantee that interference will not occur in a particular
installation.
You can determine whether your equipment is causing interference by turning it OFF. If the
interference stops, it was probably caused by the Cisco equipment or one of its peripheral devices.
If the equipment causes interference to radio or television reception, try to correct the interference
by using one or more of the following measures:
•Turn the television or radio antenna until the interference stops.
•Move the equipment to one side or the other of the television or radio.
•Move the equipment farther away from the television or radio.
•Plug the equipment into an outlet that is on a different circuit from the television or radio. (That
is, make certain the equipment and the television or radio are on circuits controlled by different
circuit breakers or fuses.)
Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval
and negate your authority to operate the product.