The Cisco SPA921 1-line IP Phone with 1-port Ethernet is now obsolete (past End-of-Life and End-of-Support status).
End-of-Sale Date: 2010-10-29
End-of-Support Date: 2015-10-30
Cisco's End-of-Life Policy
You can view a listing of available null offerings that best meet your specific needs
If you want support information for the Cisco SPA921 1-line IP Phone with 1-port Ethernet documentation, it may be available through Cisco.com Search or in the Cisco Community