In European Union countries, use only external speakers, microphones, and headsets that are fully compliant
with the EMC Directive [89/336/EC].
Caution
Ways to Provide Power to Your Phone
You can provide power to your phone in one of these ways:
• Use the power adapter that comes with your phone.
If you are not sure whether your network supports PoE, check with your administrator.
Phone Behavior During Times of Network Congestion
Anything that degrades network performance can affect phone audio 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
UL Warning
The LAN/Ethernet cable or other cables attached to the device should not be extended outside of the building.
Product Label
The product label is located on the bottom of the device.
Compliance Statements
Compliance Statements for the European Union
CE Marking
The following CE mark is affixed to the equipment and packaging.
Cisco Unified IP Conference Phone 8831 and 8831NR User Guide for Cisco Unified Communications Manager
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Product Safety and Security
Ways to Provide Power to Your Phone