Comment Re:Industrial network (Score 2) 76
Follow the money.. Who pays the bills? Do what they say...
Seriously, keeping your factory's networks separate is a pretty simple firewall issue for someone competent to install and configure it. I'm not sure how this cell phone connection is going to work, but there ARE ways to make cell phones connect to you via VPN's that can be made to require usernames/passwords (not to mention specific devices) before you are allowed to connect. There are solutions out there to do what they ask, they just cost a little bit to acquire, install, and manage.
So my "follow the money" joke, really should be this. IF the people in charge are asking for it, find and suggest a solution that can do it safely. If they are not willing to pay for your solution, find another, albeit less safe solution and present it with a list of assumed risks. Rinse and repeat until you have a solution they are willing to pay for with risks they are accepting, then do that.