On Tue, 17 Sep 2002, Peter Rundle wrote:
> Got a 56k modem setup with mgetty to allow dial-in (RH7.2).
> User connects with XP, connection lists at 33.6. But the
> performance is woeful. Maximum file transfer rate that I've
> been able to achieve is 1.5Kbytes. Latency on a ping is
> around 500ms. Changed modems at the Linux end, no difference.
> Serial port speed is set to 115200 bps, /var/log/messages
> doesn't report anything of note, where would I look to see
> the ratio of lost/retransmitted packets?
>
> Probably a Telstra poor line quality problem, but I'd like to
> see the retransmission ratio if possible.
>
> Any other hints / tips welcome.
Have you checked the UART types?
Especially if the Linux machine is an older type - you may be running some
older 16450 UART's instead of 16550AFN {or similar} UART's.
Most modern chipsets emulate them, but some don't.
DaZZa
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