Chapter3 Setting Up the Cisco Unified IP Phone
Understanding the CiscoUnified IP Phones 7906G and 7911G Components
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Cisco Unified IP Phone 7906G and 7911G Administration Guide for Cisco Unified CallManager
OL-10008-01
In some instances, the mechanics or electronics of various headsets can cause
remote parties to hear an echo of their own voice w hen they speak t o
Cisco Unified IP Phone users.
Cisco Systems recommends the use of good quality external devices, like headsets
that are screened against unwanted radio frequency (RF) and audio frequency
(AF) signals. Depending on the quality of these devices and their proximity to
other devices such as cell phones and two-way radios, some audio noise may still
occur.
The primary reason that support of a headset would be inappropriate for an
installation is the potential for an audible hum. This hum can either be heard by
the remote party or by both the remote party and the CiscoUnified 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 the Cisco UnifiedIP Phone Power Cube 3
(CP-PWR-CUBE-3).
Audio Quality Subjective to User
Beyond the physical, mechanical and technical performance, the audio portion of
a headset must sound good to the user and 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://www.vxicorp.com/cisco
http://www.plantronics.com/cisco