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From: cepek@vixvax.mgi.com
Newsgroups: comp.terminals
Subject: Re: How many characters after Cntl-S?
Message-ID: <1991Apr22.093735.938@vixvax.mgi.com>
Date: 22 Apr 91 14:37:34 GMT
References: <1991Apr18.152749.8762@cbnewsk.att.com> <189@blars>
Distribution: usa
Organization: Management Graphics, Inc.
Lines: 33

In article <189@blars>, blarson@blars writes:
> In article <1991Apr18.152749.8762@cbnewsk.att.com>
> dennis@cbnewsk.att.com (dennis.seipel) writes:
>>I am developing a DCE and want to know an acceptable number of character
>>that a DCE may transmit after the DTE sends XOFF flow control.  
:
>>Is there
>>a standard for this or can anyone refer me to a study of what terminal
>>manufactures typically design for?
:
> In other words, most equiptment will let you send some characters
> after it sends the xoff.
:
> Check the manuals of the equiptment in question if you care, but don't
> expect to find this info, it's rarly there.

Sure enough, I went to check my manuals, and couldn't find it!  :-|
I recall that for either the WYSE 85 terminal (VT220 comp.) or the
DataSouth 180(+) printer there was some statement about being rather
tolerant during this form of handshaking.  Something about sending XOFF
when the buffer was x% full, then another when the buffer was really
full.  I even think that x was user selectable.

BUT, I would NOT suggest relying on "tolerant" equipment on the other
end.  I bring this up to make people aware of this variation on the
theme.  The recommendations from blarson seem sound to me.

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