Rob is correct you can use BAT for this. I was able to make the migration in my laboratory following this procedure, please try it first with only ONE phone and see if it works for you.
1.- Open BAT and go to Configure --> Phones --> Export Phones and click on Next.
2.- Choose the export option 'All Details' and the Model 7940. Click on Export.
Exported file will be saved at C:\BatFiles\Export\Phones\ on the publisher
3.- Make a copy of the file and save it on C:\BATFiles\Phones\Insert\ on the publisher.
4.- Modify this new file from step 3 and change the MAC address and the phone button
template fields only and save the changes.
5.- You will need to delete the phone from the system (this is the tricky part)
6.- In BAT go to Configure --> Phones --> Insert Phones. Click on Next.
7.- Select the option 4: Insert Phones and click on Next.
8.- Select the 'All Details' option and on the File Name choose the file from step 4 and
click on insert.
The phone will be inserted with the new phone button template and the MAC address of the
7960 but with all the other options that the phone used to have.
HTH
//Jorge
