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A native MVS console does not talk TN3270.
A native MVS console does not talk SNA

A native MVS console requires a bisync connection to the mainframe.

To run SNA, you need VTAM up.
To run TN3270 to the mainframe, you need TCPIP running.

Even the newest CMOS processors (i.e. 9672-RC6 which were are installing in
October) require a 3270 device talking bisync to be the MVS console.

Now, once the operator has IPLed the machine with this non-SNA 3270 console,
he/she can start up TCP/IP and VTAM.  Then TN3270 devices and SNA devices
can log on and do their things - like running Omegamon, TMON/MVS, or Netview
and display the operator console.

Dennis Longnecker

-----Original Message-----
From: Mainframe Operations Discussion List
[mailto:OPERS-L@VM1.CC.UAKRON.EDU]On Behalf Of David F. Lambert
Sent: Saturday, September 12, 1998 2:05 PM
To: OPERS-L@VM1.CC.UAKRON.EDU
Subject: Re: 3270/3274 emulation package


On Fri, 11 Sep 1998 21:48:55 -0700 Dennis Longnecker said:
>For this problem to be solved, all they would do is obtain a PC with a coax
>board in it, and run a 3270 emulation on it.

It requires less wiring and is cheaper if you can implement the connection
via TCP/IP if the host system supports that type of connection, and if the
prerequisite network wiring is already available.  No coax wiring or
or 3x7x controller is required with the network option.  Kerberized
versions of telnet (or TN3270) are available to encrypt passwords
for transmission over an open TCP/IP network if password security
is an issue.

>I have done such and it works just fine.  The board I have used is an
>Attachmate board, and the PC is running Extra.  The coax connection needs
to
>be plugged in to a channel attached (non-SNA) controller.

Actually, coax connected 3270 type devices can also be attached to SNA
controllers.  Additionally, 'remote' controllers may be used which
are typically connected via a front end processor instead of channel
attached.  'Local' controllers are always channel attached, even if they
are remotely located by using a pair of channel extenders or extended
fiber using an ESCON channel connection.

>Dennis Longnecker
>Administrator for the Courts

Dave Lambert
MIT
(617) 253-7095