Appendix A Safety Information; Safety Notices - Cisco 7940 Series User Manual

Safety Notices

To avoid electric shock, do not connect safety extra low voltage (SELV)
Warning
circuits to telephone network voltage (TNV) circuits. LAN ports contain
SELV circuits, and WAN ports contain TNV circuits. Some LAN and WAN
ports use RJ-45 connectors. Use caution when connecting cables.
The following warnings apply when you use the external power supply with
Warning
the Cisco IP Phone:
This product relies on the building's installation for short-circuit (over
Warning
current) protection. Ensure that a fuse or circuit breaker no larger than 120
VAC, 15A U.S. (240 VAC, 10A international) is used on the phase conductors
(all current-carrying conductors).
Warning The device is designed to work with TN power systems.
Cisco IP Phone 7960 and 7940 Series User Guide
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Appendix A Safety Information
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