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From: johnth@batcomputer.tn.cornell.edu (John Thurtell)
Newsgroups: comp.os.vms
Subject: Re: Experience with TCP/IP Terminal Servers at CfA
Message-ID: <824@batcomputer.tn.cornell.edu>
Date: Mon, 27-Apr-87 10:07:27 EDT
Article-I.D.: batcompu.824
Posted: Mon Apr 27 10:07:27 1987
Date-Received: Wed, 29-Apr-87 05:23:19 EDT
References: <8704252252.AA23325@ucbvax.Berkeley.EDU>
Reply-To: johnth@tcgould.tn.cornell.edu.UUCP (John Thurtell)
Distribution: world
Organization: Cornell Theory Center, Cornell University, Ithaca NY
Lines: 36

In article <8704252252.AA23325@ucbvax.Berkeley.EDU> roger%cfa2@HUCSC.HARVARD.EDU writes:
>In response to Doug Bigelow's query:
>
> We have purchased five Bridge CS/1 terminal servers.  Each is configured
> to service 64 termiinals using TCP/IP over an ethernet.  For VMS hosts we have
> one 780 and one microVAX II operating Wollongong, one 780 and about four
> microVAX II's with Excelan boards and software.  We also have at least two
> VAXes running Ultrix, about 20 Sun workstations and a few other
> TCP/IP-speaking hosts.
>
> 1)  X-OFF - X-ON flow control does not work well.  When you hit X-OFF (NO
>     SCROLL) on your terminal, you get lots of characters (hundreds) before
>     the host stops sending.  CTRL-Y, CTRL-C, and CTRL-O have similar problems.

  I think the problem you are having here is due to where your X-OFF controls
  are being processed.  Many times it will be processed by the distant host
  (in this case the VAX) and hence the terminal server buffer will need to
  clear before typing stops.  

  Your terminal server software should let you control this by
  a) selecting a smaller buffer.
  b) processing the X-OFF locally.
  You would probably like to use both of these for your application.

  You also mention problems with single characters ...  I'm not sure what to 
  say about this.  I have some experience connecting into the Wollongong 
  software over a TCP/IP network from 5-6 different UNIX systems and 2 CMS 
  systems and I have never had this problem.  It sounds like something is
  not installed correctly. I don't know if it is your Wollongong software 
  or your terminal servers.  

John Thurtell

johnth@batcomputer.uucp      
thurtell@cheme.tn.cornell.edu
p8tj@cornelld.