Hi ,
I was just checking the Cisco site and could option of Wideband Headshet change from Phone.
http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/8941_8945/8_5/english/user-guide/8945.pdf
Set Up Wideband for Analog Headset
1. Press the Applications button .
2. Select Accessories. (Use the Navigation pad and Select button to scroll and select.
A list of phone accessories is displayed.
3. Select Analog Headset and press the Setup softkey.
The phone screen displays the wideband status for the analog headset.
4. Press the Turn On softkey to enable wideband for the analog headset.
5. Press the Turn Off softkey to disable wideband for the analog headset.
6. Press the return softkey to return to a list of phone accessories.
regds,
aman