Hi Denys,

The only 2 versions that currently support the 7931 are CCM 6.0 and CME (4.0.3 and higher).

Cisco Unified Communications Manager Version 6.0

Supports the medium-sized business- and retail-friendly, multibutton Cisco Unified IP Phone 7931G

From this 6.0 doc;

http://www.cisco.com/en/US/products/ps7240/index.html

7931 doc;

http://www.cisco.com/en/US/products/hw/phones/ps379/products_data_sheet0900aecd80534259.html

Q. What Cisco Unified CallManager Express release is required for the Cisco Unified IP Phone 7931G?

A. The new Cisco Unified IP Phone 7931G is supported by Cisco Unified CallManager Express Version 4.0(3);

From this good Q&A doc;

http://www.cisco.com/en/US/products/hw/phones/ps379/products_qanda_item0900aecd80534289.shtml

Hope this helps!

Rob

Edit: Paolo, you are too fast my friend. Remember my crappy typing skills or should I say lack of typing skills :)