From: ptaylor [SMTP:email@example.com]
Sent: Friday, September 07, 2001 2:13 PM
To: SuSE Schools
Subject: [suse-linux-uk-schools] kppp
I am using an ISA 56K modem (not win as far as I know), and have managed to
get it working by various configurations including setserial. I am using
Uklinux and it connects at 115K but using kppp stats I see that it
consistently leaps and troughs quite badly and keeps stalling. The average
speed is about 600b/sec. Using a different modem on another machine I get a
good through rate with the same uklinux phone numbers so I assume it is some
setting in the modem itself or one on the linux box that is awry? It seems to
go quite quickly and gradually die and then continuously stall.
Any tips for configuration or trouble-shooting?
Firstly it is highly unlikely that the problem lies with the
application Kppp, this is mearly a method for controlling the
pppd deamon and bringing up the modem link.
I (and my parents) have problems with bandwidth on UkLinux (an
otherwise excellent service) and I've had an almost identical
problem with respect to the 'stalling'. I believe that it is the
phone link rather than any 'software', I can make most of the
problem go away if I unplug the adjacent telephone, this seems
to make the line perform better.
I'm guessing that it is related to the amount of noise/echo
on the line. The recommended maximum for a phone line is a REN
of 4.0, most phones/modems are 1.0.
Hope this helps,