Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!ucsd!ucsdhub!hp-sdd!ncr-sd!crash!jeh
From: jeh@crash.cts.com (Jamie Hanrahan)
Newsgroups: comp.os.vms
Subject: Re: DECNET over Telnet
Summary: It depends on what the Telnet uses for a terminal driver.
Message-ID: <3254@crash.cts.com>
Date: 28 Jul 88 22:32:04 GMT
References: <880721104919.bc@Warbucks.AI.SRI.COM>
Reply-To: jeh@crash.CTS.COM (Jamie Hanrahan)
Organization: CMKRNL Press, San Diego, CA
Lines: 17

In article <880721104919.bc@Warbucks.AI.SRI.COM> Adelman@Warbucks.AI.SRI.COM (Kenneth Adelman) writes:
>> Does anyone know if you can run asynchronous DECnet over a telnet connection?
>
>    I don't know of anyone who has done this, but is in theory
>possible.  You would need to have a VMS terminal driver on both sides
>of the telnet connection. In other words, use a psuedo-terminal for
>the telnet outbound as well as the telnet inbound and use SET HOST/DTE
>instead of a program like TELNET which talks to the network directly.
>Then you could SET TERM/SWITCH=DECNET/PROTOCOL=DDCMP and cross your
>fingers.  Sounds tricky, and a kludge at best.

This will work if and only if the Telnet package in question implements its
pseudoterminals via a terminal port driver that sits under the standard VMS
terminal class driver.  Async DDCMP is implemented as a class driver that 
replaces the terminal class driver for the ports in question.  If Telnet's
pseudoterminal implementation doesn't work this way, there's no way async
DDCMP can be used with it... but if it does, it should work just fine.