The Cisco Unified IP Phone 9900 and 8900 Series Accessories has been retired and is no longer supported.
End-of-Sale Date: 2016-07-05
End-of-Support Date: 2021-07-31
Cisco's End-of-Life Policy
You can view a listing of available Collaboration Peripherals offerings that best meet your specific needs
If you want support information for the Cisco Unified IP Phone 9900 and 8900 Series Accessories documentation, it may be available through Cisco.com Search or in the Cisco Community