-=> Quoting MIKE FARRILL to DAVID WEI <=-
 -> I think he was refering to V.42 Error correction, which I believe can
 -> be called LAPM... (however, I'm not too sure about that... :) )
V42 is the method by which error correction protocols are signalled
not the error correction method itself
 MF> I'm pretty sure its called LAPM... I wonder if they will ever make
 MF> better error correction/data compression.
Link Access Procedures for Modems - we only get the cheeep end of the
market - 128 byte or 128 byte with Selective REJect on budget modems,
244 (256 in reality?) on more expensive.  There's some with 512 around,
but not really in hobbiests' price range.
If you've got purrfect lines to your remote then MNP4's best since on
both budget and not-so-budget modems that's available with a 256 byte
packet size.  It's also got less overhead than either version of
LAP-M.  But just one BLER (BLock ERror) and the whole 256 will have to
be sent again
As far as data compression is concerned, the best is NONE.  And fully
compress the data your transferring with an uptodate compressor such
as UC/2.  Also, switch compression off when transferring pre-compressed
files since an effect called "zero-stuffing" accounts for the slight
decrease in apparent effective thruput noticed
If by better you mean better for maintaining a higher thruput on duff
lines then, in the absence of LAP-M with SREJ, MNP10's good, since
it'll go down to 8 byte resends.  But it does carry more overhead...
rgdZ
Richard
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