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From: hellier@skat.usc.edu (Chuck Hellier)
Newsgroups: comp.protocols.tcp-ip.ibmpc
Subject: TN3270 on Micom Gateway
Keywords: TN3270, Micom, MVS
Message-ID: <14825@oberon.USC.EDU>
Date: 20 Jan 89 19:58:08 GMT
Sender: news@oberon.USC.EDU
Reply-To: hellier@skat.usc.edu (Chuck Hellier)
Distribution: all
Organization: University of Southern California, Los Angeles, CA
Lines: 73


I have a problem running MICOM-Interlan Telnet V1.0 - May 20, 1988 via
a MICOM NetWare TCP/IP gateway (with a Micom NP600 connected to our
campus wide-area network) on a Novell server running Netware SFT
v2.10.  The host I wish to connect to is an IBM 3090 running TSO; that
Server Telnet is Access/MVS <V2.1>.  

When telnetting from our Sun 3/50s (BSD 4.2) to MVS, we are able to
negotiate a full-screen edit session, as well as the line mode
(line-at-a-time) session.  The IBM-3278 terminal emulator works
beatuifully.
When telnetting from PCs to MVS, we _cannot_ negotiate a full-screen
edit session, only a simple line mode session.  We are using
Add-A-Terminal's Adds Viewpoint/78 terminal emulator, which is reputed
to fully emulate a 3278 terminal.

This is a beginning of the script of the telnet (Sun->MVS):

>Script started on Thu Jan 19 14:07:44 1989
>% tn3270
>tn3270> toggle options
>Will show option processing.
>tn3270> open mvsa
>Trying...
>Connected to mvsa.usc.edu.
>RCVD will SUPPRESS GO AHEAD (reply)
>SENT do SUPPRESS GO AHEAD (reply)
>
>OS/MVS SERVER TELNET -- AT HOST MVSA.USC.EDU                    
>ACCES/MVS <V2.1> -- Thu, 19 Jan 89 14:08:01 PST
>
>Enter "NEWS" for current news.  Last updated:  14 Apr 88.
>
>ENTER COMMAND OR 'HELP':
>tso hellier
>RCVD do TERMINAL TYPE (reply)
>SENT will TERMINAL TYPE (don't reply)
>Received suboption Terminal type - request to send.
>Sent suboption Terminal type is IBM-3278-2.
>RCVD do END OF RECORD (reply)
>SENT will END OF RECORD (don't reply)
>RCVD will END OF RECORD (reply)
>SENT do END OF RECORD (reply)
>RCVD do BINARY (reply)
>SENT will BINARY (don't reply)
>RCVD will BINARY (reply)
>
>------------------------ USC - System MVSA - TSO LOGON----------------------

I do not have a script of the telnet (PC->MVS), however, I examined a
session (showed option processing), and I noticed that the process
started exactly the same EXCEPT that there was no 
	RCVD do TERMINAL TYPE (reply)
or anything after it.  The MVS Telnet merely went into a line mode
session.  

So, the QUESTION is:
Does the MICOM-Interlan Telnet understand the 
	suboption Terminal type - request to send
message?  If it does, does the Add-A-Terminal Adds Viewpoint/78
emulator send the proper Terminal type?

Interesting, huh?



Please respond to me directly.
						TIA,
						Chuck 
----------------------------------------------------------------------
Chuck Hellier					For you are young
hellier@skat.usc.edu				and life is long
Network Systems Consultant			and there are risks