Use CSA or ATEX qualified accessories with the Cisco Unified IP Wireless Phone 7925G-EX in hazardous
environments.
Warning
For a complete list and description of accessories, see the Cisco Unified Wireless IP Phone 7925G, 7925G-EX,
and 7926G Accessory Guide.
For more information about the phone and the Cisco Unified Wireless IP Phone 7925G Desktop Charger, see
Cisco Unified Wireless IP Phone 7925G Desktop Charger, on page 115.
Headset Information
To use a headset, see Handset, Headset, and Speakerphone, on page 107. Although Cisco performs some
internal testing of third-party wired and Bluetooth wireless headsets for use with the Cisco Unified Wireless
IP Phone 7925G, 7925G-EX, and 7926G, 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.
Cisco 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. See
External Devices Usage, on page xx for more information.
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, electric motors, large PC monitors. In some instances,
the mechanics or electronics of various headsets can cause remote parties to hear an echo of their own voice
when they speak to Cisco Unified IP Phone users.
Bluetooth Wireless Headsets Notes
Using Bluetooth wireless headsets likely increases battery power consumption on your phone and may result
in reducing battery life.
For a Bluetooth wireless headset to work, it does not need to be within direct line-of-sight of the phone, but
some barriers, such as walls or doors, and interference from other electronic devices, can affect the connection.
Audio Quality
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, but some of the headsets on the sites listed below have been reported to perform well on
Cisco Unified IP Phones.
Nevertheless, it is ultimately the customer's responsibility to test this equipment in their own environment to
determine suitable performance.
For information about wired and Bluetooth wireless headsets for your phone, see the Cisco Unified Wireless
IP Phone 7925G, 7925G-EX, and 7926G Accessory Guide and these web sites:
Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G User Guide
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Phone Installation
Headset Information
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