On Mar 30 13:25 96, Sam Benson of 3:640/249 wrote:

SB> I'm have problems with my Netcomm M34F. It is a 28.8 kbps modem.

SB> I am experiencing a large number of synchronisation errors and CRC errors 
SB> in downloading files from BBS. I'm getting about 30+ for a 1MB file 
SB> download. I don't get any errors uploading files. I been having theses 
SB> problems for a while.

This is characteristic of interrupt overrun - the data is coming in too
fast for your computer when some critical event, probably a disk write,
occurs.

SB> Are these errors a product of line noise or it is something I can play with 
SB> with my modem settings (sorry I don't have them to hand) to improve 
SB> (reduce) the number of errors I'm getting.

If my diagnosis above is correct, the fix is to obtain and fit a 16550 UART
chip, with builtin FIFO buffering.  Line noise is not uniquely one-way,
even with the admitted asymmetrical capability of V.34.

Your modem settings are vaguely possible - you should have CTS/RTS
handshaking turned on, for instance.  Caveat - handshaking affects the
outbound channel, not the inbound one.  Inbound traffic _HAS_ to be taken
as it comes, and cannot be stopped by local handshake techniques.

Regards,
Dave Hatch.

--- Msgedsq 3.20