"The board was I think essentially a USB Hub where you would host a dozen or more GSM Modems." That's an interesting form factor. I'm using a traditional USB d

"The board was I think essentially a USB Hub where you would host a dozen or more GSM Modems." That's an interesting form factor. I'm using a traditional USB dongle. "What model modem are you using?" ZTE MF833V 4G LTE. You can plug many USB dongles into a USB hub and operate dozens of sim cards. Although the link you shared would likely be more affordable. "Some ideas this could be useful for..." I do run a home server, and I plan on using this for home automation! I'm also building a home assistant with an SMS interface. I love the simplicity of the medium. "I would be interested in trying this out for fun." I'm testing and compiling the Hayes commands that apply to GSM modems. The process isn't bad once you figure which commands to use and in which order. If you're interested, I can link you to the document once its finished. It took me 2 weeks to find the right commands and get them working. Any particular reason for your interest or just an opportunity to learn something new?