Cisco Systems 7931G manual Headset Support, Audio Quality Subjective to the User

Connecting Your Phone

Headset Support

Although Cisco Systems performs limited 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.

Cisco recommends the use of good quality external devices, for example 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 mobile phones and two-way radios, some audio noise or echo can still occur. An audible hum or buzz may be heard by either the remote party or by both the remote party and the Cisco Unified IP Phone user. Humming or buzzing sounds can be caused by a range of outside sources; for example, electric lights, electric motors, or large PC monitors. See Using External Devices, page 2 for more information.

Note In some cases, hum can be reduced or eliminated by using a local power cube or power injector.

These environmental and hardware inconsistencies in the locations where Cisco Unified IP Phones are deployed means that no single headset solution is optimal for all environments.

Cisco recommends that customers test headsets in their intended environment to determine performance before making a purchasing decision and deploying en masse.

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 to the party on the far end. Sound quality is subjective and Cisco cannot guarantee the performance of any headsets However, a variety of headsets from leading headset manufacturers have been reported to perform well with Cisco Unified IP Phones. See the manufacturers’ sites for details.

For information about wireless headsets that work in conjunction with the wireless headset remote hookswitch control feature, go to this URL:

http://www.cisco.com/pcgi-bin/ctdp/Search.pl

1.From the Enter Solution list box, choose IP Communications. The Select a Solution Category list box displays.

2.Choose IP Phone Headsets to see a list of Technology Development Program partners.

If you want to search for a particular Technology Development Program partner, enter the partner’s name in the Enter Company Name box.