Thanks for such a detailed reply. I guess the only thing I was worried about was that the CCR routers might not support USB devices, since it's got an interesting CPU architecture (TILE), and in a lot of cases nobody writes drivers for esoteric architectures. I guess MikroTik guys did, if you have it working.
I wanted to get a USB LTE interface for the office, to have as a failover solution, because we're having Comcast outages at least a couple of times a month. There's no other ISPs in the building, so the only option is a good LTE connection.
The
peripherals list on the MikroTIk wiki is also irrelevant for me, because most of the devices on there are for EU markets (different bands), except maybe the Novatel USB730L (I've seen it on Verizon's online store). But I'll leave this discussion about LTE devices for another thread.
I'll report back when I have at least one LTE USB device recognized.
-- edit:
Also a good idea about the UPS USB based connection, I'll try that next week. We've had Junipers routers die due to outages because we couldn't connect our UPS to them to perform a graceful shutdown (both Juniper routers we had ended up with flash corruption, we can't even re-flash them with the downloaded firmware).