I'm looking to upgrade from 7.1.3 to a newer version.
The reason for this is to support the new 9971 phone as it doesn't appear in my list of phones.
I currently have a Publisher and a subscriber. My phones are registered to the Publisher at the moment. I'm looking for a way to upgrade without having my phones upgrade as soon as the upgrade is completed. I work in a hosptial and to have all the phones upgrade at once, is unacceptable. Any ideas as to what I can do to bypass this situation?