Thanks for the response. I had been told the same thing that Trimble encrypts GLONASS data as well by TopCon tech support. I can configure the Topcon receiver to accept either CMR+ or RTCM3 corrections. My plan was to try to source a standalone rover radio that could be configured to output that over serial to the black (RH) port on back of AGI-4 receiver even if CMR+ is all that's available. Do you know of any Trimble radio models that would do such a thing by chance? | 
Trimble 900Mhz stand alone radio for RTCM or CMR output
