Path: utzoo!utgpu!news-server.csri.toronto.edu!torsqnt!lethe!geac!alias!imax!dave
From: dave@imax.uucp (Dave Martindale)
Newsgroups: comp.dcom.modems
Subject: Re: Error-correcting modems & uucp
Message-ID: <1990Apr12.002225.7496@imax.uucp>
Date: 12 Apr 90 00:22:25 GMT
References: <963@frcs.UUCP> <967@frcs.UUCP> <1147@chinacat.Unicom.COM>
Reply-To: dave@imax.com (Dave Martindale)
Organization: Imax Systems Corporation, Oakville Ontario
Lines: 23

In article <1147@chinacat.Unicom.COM> chip@chinacat.Unicom.COM (Chip Rosenthal) writes:
>
>What you are probably seeing is the overhead of (a possibly poorly
>implemented) flow control.  Some of the recent messages in these groups
>have been dancing around a point, but I'm not sure anybody has flat out
>said it:
>
>    For uucico you do not want flow control; for interactive users
>    you do want flow control.

A useful note: if you have Telebit modems used for both interactive users
and uucp, you may be able to just set flow control on and leave it that
way.  When you use uucp-spoofing mode, the flow control is handled by
the packet protocol between uucico and the modem, and the setting of
the modem's flow-control flag is irrelevant.  So, you don't need to do
anything special to turn off flow control for incoming or outgoing uucp
connections.

A possible exception to this is if you have non-PEP uucp connections.
For those, no spoofing will be done, and you may have to turn off flow
control.  (or maybe not - uucico will only send 3 64-byte packets
before waiting for an acknowledgement; the modem may not flow-control
that small an amount of data).