Article View: comp.protocols.ibm
Article #815Re: 3270 ATTN key -- what does it generate?
From: Karl Denninger
Date: Thu, 27 Dec 1990 16:57
Date: Thu, 27 Dec 1990 16:57
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1629 bytes
In article <374@rufus.UUCP> drake@drake.almaden.ibm.com writes:
>The ATTN key is, as was already mentioned, an out-of-band communications key.
>It's the moral equivalent of the "escape" key in many telnet implementations;
>you hit the escape key (often ctl-t) and the telnet client prompts you to
>enter various commands. When the command completes you're put back into your
>telnet session.
>
>ATTN is used similarly to allow 3270s to exit their host session and talk to
>the network. This allows users to forcibly log off from hosts (a la ctl-t Q)
>and other such things.
>
>Since ATTN's used to talk to the network (VTAM, the 3x74 et al), not the host,
>I'm not sure how you'd implement it on a telnet server.
The Mitek uses a IAC BREAK (ala out-of-band Telnet command) to do this.
Let's hope IBM's TCP/IP for MVS supports this.... otherwise when we get real
TCP/IP loaded on the 3090s around here, we'll not be happy anymore!
Right now what we have works...
--
Karl Denninger AC Nielsen
kdenning@ksun.naitc.com
(708) 317-3285
Disclaimer: Contents represent opinions of the author; I do not speak for
AC Nielsen on Usenet.
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!bbs.UUCP!karl From: karl@bbs.UUCP (Karl Denninger) Newsgroups: comp.protocols.ibm Subject: Re: 3270 ATTN key -- what does it generate? Message-ID: <9012272109.AA07995@lilac.berkeley.edu> Date: 27 Dec 90 16:57:25 GMT Sender: daemon@ucbvax.BERKELEY.EDU Reply-To: Karl Denninger <ddsw1!bbs!karl@GARGOYLE.UCHICAGO.EDU> Organization: The Internet Lines: 27