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[aprssig] Project-25 for amateur radio

Stephen H. Smith wa8lmf2 at aol.com
Sun Aug 17 05:04:39 UTC 2008


Scott Miller wrote:
> But is there any user-accessible interface for this data, or is it just 
> some reserved bandwidth in the protocol that'd require hacking the radio 
> to get at?
>
> Scott
> N1VG
>
>   


Precisely  You've got it!   'As I explained in an off-list reply to Bob:  

"[I.e. there is no standard "serial port data I/O" or equivalent on the 
back of a P25 radio  that lets you stuff data in at one radio and have 
it come out out a jack on the radio at the other end.]        [The 88 
bps low-speed data logical "channel" has bytes set aside in each 
double-packet of transmitted data in the bit-level description of the 
packet structure, but there is NO standard interface for exploiting it.  
Every vendor does different things with it.]"




--

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