I don't completely agree. AX.25 is heavily based on X.25, where the address
field and the use of repeaters is extended. But the signalling (SABM, RR,
DISC, etc) is quite similar to X.25. AX.25 is closely related to X.25, but
there are HAM-specific differences.
Anyway, how official is AX.25? The X-protocols are developed/approved by
ANSI committees if I'm not mistaken, who is the regulatory organ that
gives/gave the advisory on AX.25 ?
(Please don't understand this wrong... the HAM radio world basically agrees
on WHAT AX.25 is, and what its range of use is.)
Makes us think about better protocols than AX.25 with HDLC. Something that
takes care about error-avoidance and recovery in a radio environment. This
is something where we (the radio amateurs) can contribute to, something that
hasn't been chewed on by the academic and industrial world for years and
years.
And long live Linux! At least an operating system that allows us an easy
implementation of whatever protocol we want to experiment with... The times
of NOS and MS/DOS are gone...
--Ramon