Headset; Audio Quality Subjective To The User - Cisco 7970G - IP Phone VoIP Administration Manual

Chapter 3 Setting Up the Cisco Unified IP Phone

Headset

Audio Quality Subjective to the User

Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 6.1
OL-14626-01
You can disable the speakerphone by using Cisco Unified Communications
Manager Administration. To do so, choose Device > Phone and locate the phone
you want to modify. In the Phone Configuration for the phone, check the Disable
Speakerphone check box.
Although Cisco Systems performs some internal testing of third-party headsets
for use with the Cisco Unified IP Phones, Cisco does not certify or support
products from headset or handset vendors. Because of the inherent environmental
and hardware inconsistencies in the locations where Cisco Unified IP Phones are
deployed, there is not a single "best" solution that is optimal for all environments.
Cisco recommends that customers test the headsets that work best in their
environment before deploying a large number of units in their network.
In some instances, the mechanics or electronics of various headsets can cause a
remote party to hear a voice echo when speaking to a Cisco Unified IP Phone
user.
Cisco Systems recommends the use of good quality headsets that are screened
against unwanted radio frequency (RF) and audio frequency (AF) signals.
Depending on the quality of headsets 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 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.
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.
Understanding the Cisco Unified IP Phone 7970 Series Components
3-5