Phone Behavior During Times of Network Congestion
Cisco cannot guarantee the performance of external devices, cables, and connectors.
Caution
In European Union countries, use only external speakers, microphones, and headsets that are fully compliant
with the EMC Directive [89/336/EC].
Phone Behavior During Times of Network Congestion
Anything that degrades network performance can affect 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
Compliance Statements
FCC Compliance Statements
The Federal Communications Commission requires compliance statements for the following:
FCC Part 15.21 Statement
Changes or modifications not expressly approved by the party responsible for compliance could void the
user's authority to operate the equipment.
FCC RF Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. End
users must follow the specific operating instructions for satisfying RF exposure compliance. This transmitter
must be at least 20 cm from the user and must not be collocated or operating in conjunction with any other
antenna or transmitter.
FCC Receivers and Class B Digital Statement
This product has been tested and complies with the specifications for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used according to the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which is found by turning
the equipment off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
Cisco ATA 191 User Guide for Cisco Unified Communications Manager
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Product Safety and Security
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