Satel modems need to have the data packetised, here is an example of how to calculate it using one customers data
When we calculate system timing , the formula is following:
TIME = Data Base to Rover 200 byte = 200byte*10bits / 19.200 kb/s = 104msec . + 21msec = 125 mseconds = Rover get the message and then it respond =>
TIME = Data Rover to Base 92 byte = 92*10 / 19.200 = 48 msec + 21 msec = 69 mseconds
Your system sending interval is 5 Hz = 5 times in a second = 1/5 = 200msec intevals
Total time = 125+69 = 194msec < 200ms = This system works!
When you increase interval to 10 Hz = 100ms and then data will collide from base & from rover