Path: utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!decwrl!decvax!ucbvax!BLUTO.SCC.COM!enger
From: enger@BLUTO.SCC.COM
Newsgroups: comp.protocols.tcp-ip
Subject: Using DEC VT200 mode through telnet
Message-ID: <8802251027.AA21810@ucbvax.Berkeley.EDU>
Date: 24 Feb 88 00:53:00 GMT
Sender: usenet@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 20


Greg:
I believe VT200 mode allows the system to transmit 8-bit control codes to the
terminal.  TPU takes advantage of this.  For instance, the "<esc>[" sequence
is replaced by "<csi>" (9B in hex).  This makes the host/terminal
communications more compact, and perhaps quicker. 

Unfortunately, the intervening com facilities must pass 8-bit codes.
I don't think telnet normally does this.

I logged into my Sun running their latest software, but couldn't find
an option to put its telnet into binary mode.

I logged onto our VMS Vax, and fired up the Wollongong telnet. It does support
a "binary" mode, and this successfully runs TPU. Unfortunately, the command
cannot be placed into their TELINIT. telnet startup configuration file;
instead it must be typed in manually once the connection has been opened. 

Best wishes,
Bob Enger