title: SPDH protocol documentation
body: <p>I seem not to be able to find any documentation on SPDH protocol for POS terminals. It would be very helpful if anyone could point me to some.... Thank you</p>
  
  <p>EDIT: forgot to mention that i did look at this question, but the link to the documentation does not work... <a href="https://stackoverflow.com/questions/601746/an-analyzer-for-spdh-frame">An analyzer for SPDH frame</a></p>