Audio Quality Subjective To The User; Connecting A Headset; Disabling A Headset; Using External Devices With Your Cisco Unified Ip Phone - Cisco 7940 - IP Phone VoIP Administration Manual

Understanding the Cisco Unified IP Phone 7960G and 7940G Components
These environmental and hardware inconsistencies in the locations where Cisco Unified IP Phones are
deployed means that there is not a single headset solution that 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 manufacturer's sites for details.

Connecting a Headset

To connect a headset to the Cisco Unified IP Phone, plug it into the Headset port on the back of the
phone. Press the Headset button on the phone to place and answer calls using the headset.
You can use the headset with all of the features on the Cisco Unified IP Phone, 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.

Disabling a Headset

You can disable the headset through the Cisco Unified Communications Manager Administration
application. If you do so, you also will disable the speakerphone.
To disable the headset from Cisco Unified Communications Manager Administration, choose Device >
Phone and locate the phone that you want to modify. In the Phone Configuration window for the phone,
Product Specific Configuration area, check the Disable Speakerphone and Headset check box.

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 that are shielded (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 or
two-way radios, some audio noise may still occur. In these cases, Cisco recommends that you take one
or more of the following actions:
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Cisco cannot guarantee the performance of the system because Cisco has no control over the quality of
external devices, cables, and connectors. The system will perform adequately when suitable devices are
attached using good quality cables and connectors.
Cisco Unified IP Phone 7960G/7940G Administration Guide for Cisco Unified Communications Manager 7.0 (SCCP)
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Move the external device away from the source of the RF or AF signals.
Route the external device cables away from the source of the RF or AF signals.
Use shielded cables for the external device, or use cables with a better shield and connector.
Shorten the length of the external device cable.
Apply ferrites or other such devices on the cables for the external device.
Chapter 3 Setting Up the Cisco Unified IP Phone
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