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000211_news@columbia.edu_Sun Apr 23 10:13:38 1995.msg
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From: jrd@cc.usu.edu (Joe Doupnik)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Why do I get ^Q's when I execute my scripts?
Message-Id: <1995Apr23.161338.48371@cc.usu.edu>
Date: 23 Apr 95 16:13:38 MDT
References: <3n6gmd$3m0@nrcnet0.nrc.ca> <3ne69h$oqq@nrcnet0.nrc.ca>
Organization: Utah State University
Lines: 44
Apparently-To: kermit.misc@watsun.cc.columbia.edu
In article <3ne69h$oqq@nrcnet0.nrc.ca>, Bradley Pick <BPICK@CISTI.LAN.NRC.CA> writes:
> BPICK@CISTI.LAN.NRC.CA wrote:
>>
>> Using ms-dos kermit 3.14 I receive back ^Q's throughout scripts
>> when telneting to various hosts, in this case an IBM mainframe.
>> This seems to happen when my script pauses after issuing some
>> commands. I've played around with the obvious choices of flow control
>> parity, etc.... and nothing worked.
>>
>> The strange part is that I do not get any ^Q's back when I manually
>> do a telnet.
>>
>> Any help is appreciated.
>>
>> Brad
>
>
> I've read about "set handshake" in the book "using ms-dos kermit" and
> on page 57 it tells me what ^Q is.But when i try to change it to
> XON , XOFF ,CR or to the equivalent code I alway end up having
> "HANDSHAKE CHARACTER: 36" If I say "SET HANDSHAKE XON" should I not
> see "SET HANDSHAKE CHARACTER: XON" when i do "SHOW COM" or am I doing
> something seriously wrong here.
>
> Thanks
> Brad
------------
Handshake and flow control are different animals. HANDSHAKE
is for logical half duplex control exchange ("your turn to talk")
and is encountered almost entirely with IBM mainframe frontends these
days. The frontend sends a Control-Q to say "go ahead".
Flow control can use Control-S/-Q, and will interact badly
with the half duplex scheme above (and should never be used with it).
Control-S/-Q is for full duplex channels, and it flows in the opposite
direction as the data it is trying to regular, and at the same time.
This paragraph is for readers who may confuse the two uses.
Now in your situation we have an IBM mainframe frontend sending
the HANDSHAKE Control-Q, and it is entirely up to it which code it will
use (it's not a Kermit protocol negotiation item). MSK will recognize
the incoming Control-Q during Kermit packet exchanges, but not otherwise.
I think your solution is to put the IBM frontend into VT100 emulation
mode, full duplex style. IBM mainframe experts can chime in here with the
proper terminology.
Joe D.