Specifications

Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7921G
Installing the Cisco Unified Wireless IP Phone 7921G
3-22
Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified CallManager Release 4.1, 4.2, 5.0
OL-10802-02
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. See the
“Safety Information” section on page 3-6 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 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.plantronics.com
http://www.jabra.com
Connecting a Headset
To connect a headset to the Cisco Unified Wireless IP Phone 7921G, plug it into
the headset port on the right side of the phone.
You can use the headset with all of the features on the Cisco Unified Wireless
IP
Phone 7921G, including the Volume and Mute buttons. Use these buttons to
adjust the ear piece volume and to mute the speech path from the headset
microphone.
Using External Devices with Your Cisco Unified IP Phone
The following information applies when you use external devices with the
Cisco
Unified IP Phone:
Cisco recommends the use of good quality external devices (speakers,
microphones, and headsets) that are shielded (screened) against unwanted radio
frequency (RF) and audio frequency (AF) signals.