this is a free software to test transparent port on NXDN radios, you can chat between radios and also send txt files from one pc to another using RF, if you want to send a text file i recommend to run it as administrator
https://www.dropbox.com/s/1bsehkzft2x08zu/NXDN.zip?dl=0
regards
https://www.dropbox.com/s/1bsehkzft2x08zu/NXDN.zip?dl=0
regards