Re: callsign limit

["David D. Hagood" <wowbagger@sktc.net>]

Ralf Baechle DL5RB wrote:
> One of my crazier ideas to deal with the issue of the longer callsigns
> was using a hash value instead.  The probability of colissions is low but
> how to do the reverse mapping from hash to callsign ...
> 
>   Ralf
>

Since a callsign is always from the set [A-Z0-9] (36 chars, 5.2 bits of 
data per character for a naive encoding) could you not simple encode the 
callsign of an otherwise too-long call as 6 bits per character packed 
into the octets, with a specific leading character to indicate 
compression (e.g. '?') - yielding about 8 chars/call.