version for narrow band channels?
can the software be modified for narrow band channels : limited amount of data exchanged between radios, variable bit rates, short bursts of data for voice and data using quadrature modulations instead of frequency modulation, time slot reservation scheme , allocation of burst transmission over several frequencies, probably more limited maximum number of simultaneous users (not the whole internet) , gateway from narrow band radio world to wide band world to extend the range further (cell , wifi, ethernet), the routing that takes into account the bit rate capability of each link, since radio power amplifiers take lots of current conserving prime power (battery) efficient systems makes lots of sense
there are many examples of systems where there are no wifi, ethernet or cell phone coverage where many people have to work in cooperation and need voice + text messaging over large areas