The first device worked well for four years. It got funny on the fifth and died. Radio reception seems to be one of them. The second unit worked fine for three days and died. This time it seems to be the interface between the radio part and the part that connects to the internet. I hired a guy who is our charter school's IT guy and runs 53 hotspots with a thousand computers using this system. I haven't messed anything up with a single box. He seems to understand everything, but I'm having a hard time dissecting all of this based on the information I have from EnGenius. There was only one response to an email sent to EnGenuis Technical Support. However, it could be that they were shut down because of this Covid-19 thing and forgot to tell everyone they hung it. The second block was replaced by the third block. I hope they figured it out and fixed the Achilles' heel.
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