I would like to upgrade a 7962G to a more updated firmware version. I am not able to find documentation on how to upload the file to CUCM 7.1 and perform the upgrade only to one or two phones, before deploying the new firmware to rest of the phones. 7962 phones in our enviroment are on firmware SCCP42.8-4-3S. Does anyone know where to find some documentation about this? Thanks.