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14 OL-8134-01
The primary reason that a particular headset would be inappropriate for the Cisco Unified IP Phone
is the potential for an audible hum. This hum can be heard by either the remote party or by both the
remote party and you, the Cisco Unified IP Phone user. Some potential humming or buzzing sounds
can be caused by a range of outside sources, for example, electric lights, being near electric motors,
large PC monitors. In some cases, a hum experienced by a user may be reduced or eliminated by using
a local power cube. See the “Using an External Power Supply” section on page 10 for more
information.
Audio Quality Subjective to the User
Beyond the physical, mechanical and technical performance, the audio portion of a headset must
sound good to you (the user) and to the party on the far end. Sound is subjective and Cisco cannot
guarantee the performance of any headsets or handsets, but some of the headsets and handsets on the
sites listed below have been reported to perform well on Cisco Unified IP Phones.
Nevertheless, it is ultimately still the customer's responsibility to test this equipment in their own
environment to determine suitable performance.
For information about headsets, see:
http://vxicorp.com/cisco
http://plantronics.com