I have a similar problem with Unitrunker 188.8.131.52. I have two RTL's and decoding the control channel works fine. It displays all the site and talkgroup information. The problem is the second voice channel sdr won't change frequencies to hear voice. I've tried Motorola and P25 systems with no luck. I was also piping the audio from the voice sdr into DSDplus and no luck. Thanks for the help.