The big difference between the DTR and Trisquare radios is that DTR uses a digital modulation (true digital voice) whereas the Trisquare units are analog voice with FHSS (Frequency Hopping). The digital voice would help out when the analog is getting very noisy and scratchy, and the FEC (Forward Error Correction) helps to correct for missed data bits due to a weak signal. I know the Trisquare units are quite good and beat out an FRS/GMRS radio for most circumstances. But I'd be interested to see a real side-by-side comparison of DTR vs. Trisquare.
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