I got a call from a friend who was trying to track down a Amazon Echo after it appeared on his company network. He said out of the blue one appeared then three then a total of eight! Obviously concerned, his company shut down the network. After stopping work and sending all employees home for the day and a physical search of the building, it is their LTE Cellspots to offload internet traffic into the net because of bad coverage.
After calls to their cellular provider they were unable to get satisfactory responses as to why a voice automated system was used in their cellular hotspot.