I'd like to set up Kannel to send SMS messages without going through a 3rd party gateway like Clickatell or Twilio. In other words, I'd like to connect to the SMPP server for each wireless services (AT&T, Verizon, etc.).
How difficult/easy is it to run a Kannel server this way? Each SMSC has to be configured for each mobile network. What is the support like for each network in the US (AT&T, Verizon, T-mobile, Sprint) and what does it take to set up a contract with the carrier? Can someone point me to a tutorial/blog for pulling this off (besides the docs)?
