HI Stevens,
Sounds like a similar problem. Took delivery of 8 last thursday, got one of them to connect no problem (had 4 others previously) and the remaining 7 don't get any visibility on the network at all. No default IP address or anything dynamically assigned.
On these ones, I have lights on the RJ45 socket, so packets are moving. On the mines themselves have both the red and green light flashing.
Have gone through a number of options, different networks, cables etc. but no joy.
Can't seem to reset the mine either. Have fired off an email and wechat to their support and hope they come back with something.