Ahh, 2 dongles is inconvenient but locking out carriers would do the job.Assessing the signal levels of all the BS's used for the monitored sites would be impractical (and beyond the scope) for this application.
You would probably have to dedicate a SDR just to poll all of the frequencies for their signal levels.
Then there is all the logic required to handle all this evaluation and call control.
It would be easier to just create some sort of carrier lockout for each site.
This would not be a "quick fix" to do.
Latest version (v1.1.2.0) can be found in this post here: Download
If you revisit this project or find the time, would you consider adding a lockout for specified carriers?
I flick between TTT and TNM regularly, the audio on TTT is second to none but having the multiple CCs in TNM is great meaning I don't miss any action, it's just the choppyness that gets to me. I had tried the multiple TTT instances but this was giving me lots of duplicated calls.
Cheers. G