Product Safety, Security, Accessibility, And Related Information; Safety And Performance Information; Power Outage; Phone Behavior During Times Of Network Congestion - Cisco 3905 User Manual

Product Safety, Security, Accessibility, and
Related Information
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Safety and Performance Information

Power outages and other devices can affect your Cisco Unified IP Phone.

Power Outage

Your access to emergency service through the phone depends on the phone being powered. If there is a power
interruption, 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 using the Service
or Emergency Calling Service dialing.

Phone Behavior During Times of Network Congestion

Anything that degrades network performance can affect Cisco IP Phone voice and video quality, and in some
cases, can cause a call to drop. Sources of network degradation can include, but are not limited to, the following
activities:
• Administrative tasks, such as an internal port scan or security scan
• Attacks that occur on your network, such as a Denial of Service attack
To reduce or eliminate any adverse effects to the phones, schedule administrative network tasks during a time
when the phones are not being used or exclude the phones from testing.
OL-23424-01
Safety and Performance Information, page 27
Cisco Product Security Overview, page 28
Accessibility Features, page 28
Cisco Unified SIP Phone 3905 User Guide for Cisco Unified Communications Manager 8.6
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