Safety - Cisco 7970G Administration Manual

Before You Begin
Do not work on the system or connect or disconnect cables during periods of
Warning
lightning activity.
To avoid electric shock, do not connect safety extra low voltage (SELV) circuits
Warning
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.
Inline power circuits provide current over the cable. Use the Cisco provided cable
Caution
or a minimum 24 AWG communication cable.
The following warnings apply when you use an external power supply.
Only use the proper Cisco approved external power supply. Reference the
Caution
installation manual provided with the phone.
Warning This product relies on the building's installation for short-circuit (overcurrent)
protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15 A
U.S. (240 VAC, 10 A international) is used on the phase conductors (all
current-carrying conductors).
The device is designed to work with TN power systems.
Warning
The plug-socket combination must be accessible at all times because it serves
Warning
as the main disconnecting device.
Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones
3-4
Chapter 3 Setting Up the Cisco Unified IP Phone
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