Xref: utzoo comp.dcom.modems:5214 comp.unix.xenix:9928
Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uwm.edu!lll-winken!elroy.jpl.nasa.gov!ames!coherent!dplatt
From: dplatt@coherent.com (Dave Platt)
Newsgroups: comp.dcom.modems,comp.unix.xenix
Subject: Re: Trailblazer Plus & disappointing throughput...
Keywords: throughput
Message-ID: <45921@improper.coherent.com>
Date: 7 Feb 90 17:52:40 GMT
References: <1844@oneb.UUCP> <511168@nstar.UUCP> <1990Feb7.011113.15033@vicom.com>
Reply-To: dplatt@coherent.com (Dave Platt)
Followup-To: comp.dcom.modems
Organization: Coherent Thought Inc., Palo Alto CA
Lines: 29

In article <1990Feb7.011113.15033@vicom.com> lmb@vicom.com (Larry Blair) writes:

> DON'T use XON/XOFF with UUCP spoofing!  The UUCP "g" protocol does not
> allow for inband signalling.

Quite so!  My experience is as follows:  if your machine's serial ports
will support the de-facto-standard RTS/CTS hardware flow control, use
it... enable it on your machine, and configure the Telebit modem to
use this form of flow control.

If your machine does not support RTS/CTS flow-control, do NOT use
XON/XOFF flow control during UUCP connections (spoofed or otherwise).
Instead, tell the Telebit to use NO flow control whatsoever!

This is often a very important step.  If you configure the Telebit to use
RTS/CTS flow control, and your host doesn't support it, you'll almost
certainly lose data during non-spoofed UUCP transfers.  If you configure
for XON/XOFF flow control, neither spoofed nor non-spoofed UUCP transfers
will work correctly, as Larry pointed out.  Saying "No flow control, please"
is much safer than requesting a flow-control which either does not work
or is incompatible with the higher-level protocols.

At least, this is my experience with a TrailBlazer Plus.

-- 
Dave Platt                                             VOICE: (415) 493-8805
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