Product Safety And Security - Cisco 7821 User Manual

Product Safety and Security

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Safety and Performance Information
Power Outage
Power outages and other devices can affect your Cisco IP Phone.
Your access to emergency service through the phone requires that the phone receive power. If a power
interruption occurs, Service and Emergency Calling Service dialing will not function until power is restored.
In case of a power failure or disruption, you may need to reset or reconfigure the equipment before you can
use the Service or Emergency Calling Service dialing.
External Devices
We recommend using good-quality external devices, such as headsets, cables, and connectors, that are shielded
against unwanted radio frequency (RF) and audio frequency (AF) signals.
Not all Cisco IP Telephony products support external devices, cords or cables. For more information,
Note
consult the documentation for your endpoint.
Depending on the quality of these devices and their proximity to other devices, such as mobile phones or
two-way radios, some audio noise may still occur. In these cases, Cisco recommends that you take one or
more of these actions:
• Move the external device away from the source of the RF or AF signals.
• Route the external device cables away from the source of the RF or AF signals.
Safety and Performance Information, page 81
FCC Compliance Statements, page 82
Cisco Product Security Overview, page 83
Cisco IP Phone 7821, 7841, and 7861 User Guide for Cisco Unified Communications Manager 10.0 (SIP)
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