SUMMARY: (non summary) SUN - SNA link

From: Antonis Kyriazis (
Date: Fri Dec 13 1991 - 06:38:20 CST

Dear fellows asked me to send a summary about; unfortunately I haven't enough information
yet. I expect to learn something about UREP, a product emulating the RSCS system(SUN Catalyst).
Meanwhile, John R. Kilheffer <>, sent me the following suggestion.
>From garfield! Mon Dec 9 21:22:58 1991
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Date: Mon, 9 Dec 91 14:22:17 EST
From: John R. Kilheffer <>
Message-Id: <>
Subject: Re: SUN - SNA Link
Status: RO

I'll agree on the "brain-dead" comment. We have successfully used "sendfile" to
encode variable record length files on the IBM for transmission via FTP to a Sun
host. We can't do anything with them once they're on the Sun, but at least we
can send them back an decode them.

We do the following:

        1. User uses "sendfile" to send a designated VM file to a disconnected
           virtual machine.

        2. Virtual machine "wakes up" upon receipt of a RDR file and proceeds
           to EXECIO read it onto a local temp disk.

        3. Virtual machine then uses FTP and sends the file in binary mode to
           one of the Sun workstations where it is stored away.

        4. Machine sends transmission acknowlegement to user.

To get a file back:

        1. User runs a program which SMSG's the virtual machine with the name
           of the file to retrieve.

        2. Virtual machines "wakes up" upon receipt of the message.

        3. Virtual machine uses FTP to retrieve the file in binary mode
           from the Sun workstation to local temp disk.

        4. Virtual machine spools RDR to requesting user and uses EXECIO to
           place the file in the spool area.

        5. Virtual machine sends transmission report to user.

Maybe this will work for your situation. Assuming you know (or have access to
someone who knows) REXX, the disconnected machine is fairly trivial to write.
Let me know if this helps.

John Kilheffer
AMP Incorporated
Supervisor, Operations / Workstation Group
I had no time to test it, but I believe it'll work because of 'sendfile' which
encodes information to fixed-record length structure.
Anyway, UREP may be faster than FTP, because the conversion begin after the
transfer (RSCS resides on UNIX too...).

If and when I have more on it, I'll post a summary.
Thank you very much John.
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