Pat, I humbly beg your pardon. Following your comment that the 3767 support was part of the TN3270 server I actually bothered to look at the manual only to find to my astonishment that Chapter 13 of the CS IP Configuration Guide is actually entitled "TN3270 Telnet Server". Thus at some point in the last 12 or 13 years, TCP/IP-for-MVS/CS-IP have managed to invent this name for the original TELNET server and I never noticed. So it's not just that one only thinks of using this server these days for 3270 access; it really carries "3270" in its name. A more accurate name, if it is to be distinguished from the USS TELNET server, would be "The VTAM TELNET Server" not to lose complete sight of the 3767 support but, as Paul said, it's words, words, words.
Incidentally by including "session" in "Would such a line-by-line connection/session ever be useful?" I intended to refer only to the "LINEMODE" device type in the - I'll have to train myself to get used to this - TN3270 server support. By trailing the idea that possibly there might be an "automation" use for this mode, I imagined I might strike a chord :-) Chris Mason ----- Original Message ----- From: "Patrick O'Keefe" <[EMAIL PROTECTED]> Newsgroups: bit.listserv.ibm-main To: <[email protected]> Sent: Wednesday, 01 February, 2006 10:13 PM Subject: Re: Access to Mainframes via Putty? > On Wed, 1 Feb 2006 07:47:36 +0100, Chris Mason <[EMAIL PROTECTED]> > wrote: > >... > >Probably it's conventional to specify one port in order to use TELNET for > >access to non-USS applications such as TSO and CICS and specify another > port > >in order to use TELNET for access to USS. Naturally the "device type" > >selected for the former is one of the 3270 "device types" and the emulator > >then presents a 3270 appearance while the device type for the latter > allows > >the emulator to give the appearance of traditional UNIX TELNET - I guess - > >I've not had the experience of accessing USS this way. > >However, the impression shouldn't be given that the port where the 3270 > >"device type" is used is exclusively TN3270(E). It is possible to use > TELNET > >on the same port with the "device type" for line-by-line use where the > >TELNET server logic maps to the data flow of a 3767 so that TSO or CICS > (or > >whatever) operate as though the session partner were using LU 1 without > >function management headers. > >... > > Chris, > I think we've go different viewpoint here rather than any real difference > of opinion. The MVS Tn3270 server supports Tn3270, Tn3270E, and line-mode > (ASCII or EBCDIC) clients. The line-mode device definition is part of the > Tn3270 server parms. As with everything in the Tn3270 server, it talks to > VTAM (as you mentioned) as a 3767 lookalike. Since that support is part > of the Tn3270 server I called that the Tn3270 port. > > The inetd telnet server (part of Unix System Services rather than part of > TCP/IP) supports ASCII telnet clients and talks to the Unix shell. > > >... > >Would such a line-by-line connection/session ever be useful? ... > >... > > The connection to the Telnet server? Definitely! It's a way to get to > the shell. > > A line-mode connection to the Tn3270 server? I can't think of any good > reason unless someone needs access to a VTAM application that supports > only LU_T1. > > Pat O'Keefe ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
