Very Computer

Any idea why when I download a file or surf the internet, the download rate
just goes keeps on diminishing until the modem "stalls"? I use an Optiflex
Speedcom 2000 56k modem and I get the following information when I use the
command setserial:

setserial /dev/ttyS0 -a
/dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8. IRQ: 4
          Baud_base: 115200, close_delay: 50, divisor: 0
          closing_wait: 3000, closing_wait2: infinte
          Flages: spd_normal skip_test

I also found from a linux newbie website that you can speed tweak a modem by
changing parameters in the options file found in /etc/options. So I set the
MTU(Maximum Transmission Unit) to 1250 and the MRU(Maximum Recieve Unit) to
1500. I still haven't noticed any change however. What do I need to setup?

Lloyd Dizon

Quote:> Any idea why when I download a file or surf the internet, the download rate
> just goes keeps on diminishing until the modem "stalls"?

This is a well-known problem with V.90.  It happened to me and I worked
with my ISP for a long time trying different modem init strings, without
success.  Finally gave up and changed ISPs, which solved the problem.  It's
probably some kind of protocol incompatibility between your modems and your
ISP's.

For lots of information about problems with 56K and troubleshooting, see
the "56K=V.unreliable" site, http://808hi.com/56k/.  I know there's a
mention of this problem (though not much in the way of a solution)
somewhere in a sample list of messages about people's V.90 problems.

Good luck,
Andrew.

I had a similar problem in Linux until I changed my PPP device
setting to point to /dev/ttyS0 instead of /dev/modem.   Don't ask me
why that would matter since /dev/modem is pointing to /dev/ttyS0
unless it was just coincidence....  Something to try though if you
have it pointing to /dev/modem.

Quote:

> Lloyd Dizon