Update Polycom CX700 version 3

Jiff has mentioned all required steps in the following articles:

Updating Lync Phone Edition Devices:

http://blog.schertz.name/2011/01/updating-lync-phone-edition-devices/

Updating Lync Phone Edition Devices for Lync 2013:

http://blog.schertz.name/2013/05/updating-lync-phone-edition-devices-lync-2013/