Installation guide

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Cisco Interface Cards Installation Guide
OL-1919-12
Chapter 1 Overview of Cisco Interface Cards
Regulatory Compliance Information and Safety
To see translations of the warnings that appear in this publication, refer to the
Regulatory Compliance and Safety Information document that accompanied your
router.
Safety with Electricity
Warning Before working on equipment that is connected topower lines, remove jewelry
(including rings, necklaces, and watches). Metal objects will heat up when
connected to power and ground and can causeserious burns or weld themetal
object to the terminals.
Warning To avoidelectric shock, do notconnect safety extra-low voltage(SELV)circuits
to telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits,
and WAN ports contain TNV circuits. Both LAN and WAN ports may use RJ-45
connectors. Use caution when connecting cables.
Warning Hazardous network voltages are present in WAN ports regardless of whether
power to the router is OFF or ON. To avoid electric shock, use caution when
working near WAN ports. When detaching cables, detach the end away from
the router first.
Warning Before opening thechassis, disconnect the telephone-network cables to avoid
contact with telephone-network voltages.
Warning Do not work on the system or connect or disconnect cables during periods of
lightning activity.