Thanks for the great input.  Could you point me to any available online 
documentation on the items you mentioned?

-Ruck




>
>On Tue, 4 Mar 2003, christian ruckdaschel wrote:
>
> > Does anyone have any experience with 3270 emulators or SNA servers?
> > My question is this:
> > My company is looking to replace a bunch of old 3270 terminals with pc's
> > (the monitors are failing on the terminals).  What I want to do is use a
> > single Linux box with a single 3270 pci card interfaced with OS/390 and
> > network (ethernet) that box with several others running 3270 emulation 
>and
> > have multiple consoles.  Is this possible?  Have I confused anyone?
> > Any help would be greatly appreciated.
> >
>
>First of all.... let's seperate the two kinds of 3270... SNA and
>NON-SNA(BiSync).
>
>NON-SNA.
>This is the kind where each terminal has it's own DEVICE ADDRESS. This has
>to be handled by a controller unfortually(sp). Now.. there is a controller
>called 2704 that will let users with a TN3270E emulator to telnet into
>this box and become a Operator Console. This box runs OS/2 with channel
>interface cards that costs like $12,000 apiece!!!
>
>SNA.
>As for the SNA. Yes, you can setup Linux boxes that people can run the
>TN3270E emulator and use that to telnet into the OS/390 system and it will
>mostly work just like a real 3270.  The connection from the Linux box to
>the OS/390-z/OS basically has to be on ethernet. The latest z800 or z900
>boxes can be equipped with ethernet connections either at 100megabit/sec
>or 1gigabit/sec. Also, the 3270 emulator is open source program found on
>RH and other distributions.  If it not on the dist that you chosen to use,
>one can download it and compile it. Also, this program comes in a
>cheracter or graphical mode programs.
>
>Also, the OS/390-z/OS system has to have the TCP/IP stack setup for
>TN3270. At work, we use this on production systems and all together, more
>than 6,000 users are using TN3270 across 6 z900 partitions(systems) and it
>hardly uses much CPU cycles.
>
>Now... as for a SNA Controller-type software running under Linux....
>well....  there is someone writing a SNA stack that will run a SNA
>connection to a OS/390 or to a Front-End processor. But I would not use
>this since IBM has basically said, "Go TCP/IP and DROP SNA" for terminal
>use. SNA is still used to internet-connection OS/390-z/OS systems so that
>users on one system can access applications on another system.
>
>
>Now.. after all this, glad you have someone that knows about all this and
>definally not confused?
>:)
>
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