I am trying to learn a bit more about simplex texting on GMRS vs. MURS. Is texting (data) permissible on MURS, but a bit more restrictive on GMRS? I know the Garmin RINOs limit texting to 13 characters (one second). Is that a self-imposes limit? I recall reading that short data transmission are allowed, but how short is that? Is the "one second rule" coming from the FCC?
I haven't looked into the Motorola T800/801s for a while. How many characters can be sent at a time with those?