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Cisco 811 and Cisco 813 Routers Hardware Installation Guide
78-10188-03
Chapter 2 Preparing for Installation
Safety
Warning
To avoid electric shock, do not connect safety extra-low voltage
(SELV) circuits to telephone-network voltage (TNV) circuits. LAN
ports contain SELV circuits, and WAN ports contain TNV circuits.
Some LAN and WAN ports both use RJ-45 connectors. Use caution
when connecting cables.
Warning
Ultimate disposal of this product should be handled according to
all national laws and regulations.
Warning
If the symbol of suitability with an overlaid cross ( ) appears
above a port, you must not connect the port to a public network that
follows the European Union standards. Connecting the port to this
type of public network can cause severe injury or damage your
router
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) is a transfer of electrostatic charge between bodies
of different electrostatic potentials, such as an operator and a piece of electrical
equipment. It occurs when electronic components are improperly handled, and it
can damage equipment and impair electrical circuitry. Electrostatic discharge is
more likely to occur with the combination of synthetic fibers and dry atmosphere.
Always use the following ESD-prevention procedures when removing and
replacing components:
Step 1 Connect the chassis to earth ground with a wire that you provide.
Step 2 Wear an ESD-preventive wrist strap that you provide, 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 properly guard against ESD damage and
shocks, the wrist strap and cord must operate effectively. If no wrist strap is
available, ground yourself by touching the metal part of the chassis. Always
follow the guidelines in the preceding section, “Safety.”