User blog comment:Zolnir/RWBY V3E3: Quick Thoughts/@comment-70.27.60.223-20151115185934/@comment-4010415-20151115201212

If Ironwood's robots obtain data routed through the CCT (for example, sending orders to all the robots in Vale, or transmitting data for other robots to be aware of something), then his robots can also become infected.

The CCT isn't just a phone tower, it's also an internet tower.