Ham: What is the mesh?
Me: It is like WiFi on amateur frequencies?
Ham: So you get the internet on it.
Me: Not really
Ham: So you talk on it?
Me: Well it is part of the AREDN system or Amateur Radio Emergency Data Network. It's a backup data network for connecting emergency services should there be a cellular/internet blackout.
Ham: That sounds cool. What else can you do with it.
Me: It's like a big toy train set for ham geeks to play with.
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