title: What is the fastest, reliable baud rate that can be used using radio modems?
body: <p>I need to communicate with 30+ devices, via serial data over radio modems (Using C). Each cycle of messages should be done as quick as possible. (&lt; 500ms)</p>
  
  <p>Basic setup would be a master sending out a broadcast, then each slave replying within their allotted time slot with their status, all synchronised nicely.</p>
  
  <p>We'll be using a frequency of around 870Mhz (license free), but I'm wondering what the physical limitation is, and what this would equate to in terms of maximum reliable (95%+) baud rates?</p>
  
  <p>Does anyone have any experience in this field that knows a ball park figure?</p>