The Cisco Unified IP Phone 7940G is now obsolete (past End-of-Life and End-of-Support status).
End-of-Sale Date: 2010-07-23
End-of-Support Date: 2015-07-24
Cisco's End-of-Life Policy
You can view a listing of available Cisco Unified IP Phone 7900 Series offerings that best meet your specific needs
If you want support information for the Cisco Unified IP Phone 7940G documentation, it may be available through Cisco.com Search or in the Cisco Community