If the software is already on the DVD disks why do you need an internet connection?
If I'm missing the point somewhere (it's certainly not unknown!), then perhaps a friend or relative with BB could download the packages and burn them to a CD-R?
Surface Pro (2017) vs Surface Pro 4
Where HTML5 is headed next
MacBook Pro v Surface Pro 5
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.