Core Issue
Cisco CallManager 3.3.3 with SR2 and later support the Cisco IP phone 7970.
For more information, refer to the Cisco CallManager Configuration section of Setting Up the Cisco IP Phone.
Resolution
The Cisco CallManager Compatibility Matrix shows that the Cisco IP phone 7970 is supported with SR2 in Cisco CallManager 3.3.3.
You must upgrade to a newer service release of Cisco CallManager 3.3.3 in order to support the Cisco IP phone 7970 in the device type. The latest version available is Cisco CallManager 3.3(3)sr4a. You candownload Cisco CallManager 3.3(3)sr4a from the Software Download-Cisco CallManager Version 3.3.
For related known problems, refer to Cisco bug ID CSCed90237.