[aprssig] AX.25 + FEC = FX.25

[Bill Vodall]

> FX.25 is a clever scheme to add forward error correction (FEC) to AX.25
> while maintaining total compatibility with older equipment.

<https://github.com/wb2osz/direwolf/blob/dev/doc/AX25_plus_FEC_equals_FX25.pdf>

If FX.25 is turned on - what affect is there on legacy AX.25 packets?
 Can the two modes run in parallel?

If I have DIREWOLF running as a digipeter - will digipeated AX.25
packets have FX.25 applied before they are sent?   Or is it FX.25 in -
FX.25 out?

Is there yet any idea of how this compares to the existing
single-bit-recovery correction scheme?

A landmark step forward for packet - thanks!!!

Bill