31 Jan '13, 7pm

How a dial-up modem handshake works

How a dial-up modem handshake works

I’ve always wanted to see this! My modem curiosity has peaked lately as I’ve been wanting/trying to set up a PPP or dialup connection across wireless via some GMRS walkie talkies my dad gave me. I was going to crack them open, look for the IC(s) responsible for the transceiver and datasheet that shit to see if either of the two pairs of walkie talkies I have are full duplex… then from there is either using some simple serial modem/audio software that I’ve found online for HAM and CB data transmission, but it’s a bit slow.. Perhaps dialup could be adopted in this manner using these handshake signals to test the “airwaves” between the two link points (walkie talkies) instead of how in this manner the modem is testing a physical medium such as copper wire instead of free space between two points, which might take a bit more software logic/dsp/filtering/waste of time. Fuck you...

Full article: http://hackaday.com/2013/01/31/how-a-dial-up-modem-handsh...

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