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000025_hvanclee@nyx.net_Fri Oct 18 09:06:56 EDT 2002.msg
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Article: 13788 of comp.protocols.kermit.misc
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Problems transferring over ppp connection
References: <1034801647.495773@irys.nyx.net> <aol3ol$sch$1@newsmaster.cc.columbia.edu> <1034844239.214811@irys.nyx.net> <aomtrv$9ns$1@blue.rahul.net>
Organization: Nyx, Spirit of the Night
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From: hvanclee@nyx.net (Henry van Cleef)
Originator: hvanclee@nyx.net (Henry van Cleef)
Message-ID: <1034909930.793290@irys.nyx.net>
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Date: 17 Oct 2002 20:57:57 -0600
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Xref: newsmaster.cc.columbia.edu comp.protocols.kermit.misc:13788
In article <aomtrv$9ns$1@blue.rahul.net>, <dold@10.usenet.us.com> wrote:
>Henry van Cleef <hvanclee@nyx.net> wrote:
>> I verified that RTS and CTS are being explicitly set in the modem init
>> string. Also played around with some of the pppd options. What
>> seems to have had an effect is disabling software compression, and
>> it's obvious that wasn't buying me anything. Netscape 4.76 has no
>
>
>I was never able to transfer largish files over PPP in one direction,
>toward the Unix box. The other direction was okay. This was using Kermit-95
>to ckermit 6.190, I think. I found that reducing the packet size in the
>"bad" direction to less than 256 was very helpful, and I suspect that
>there was a modem buffer of 256 bytes.
>
I have a hunch that buffer size may be an issue here. Since
resetting options to disable software compression, Netscape transfers
run for over an hour without ever stalling. I have verified that &H1
and &R2 are explicitly being set on dialup to put the local modem into
RTS/CTS handshaking, and that removing them makes a big (negative)
difference.
What does Netscape use as a transfer protocol? It appears from the
modem lights to be about 1K blocks, with verifies after each. This is
on the same ppp connection that I am using for kermit. It runs slick
as a whistle with Netscape--or is ssh overhead getting in the way.
Hank