Delays in connection to HP3000 via VT-MGR vs TELNET

[Art Bahrs]

Hi Glenn and All :)
    Ok... Glenn has a great point.... if the 3k in question is on the
network then you can use NS/VT in Reflection to contact your HP e3k... and
get network style connections from home.... especially if you have DSL!  (we
do this here all the time... the firewall authenticates us then lets us use
NS/VT to the 3k...

Art "much better connections! hehe " Bahrs


   We do this here... this way we don't even use our support modem... just
come in via the firewall....
----- Original Message -----
From: "Glenn Waters" <Glenn_Waters@ncsu.edu>
To: <powerh-l@lists.swau.edu>
Sent: Wednesday, May 16, 2001 10:41 AM
Subject: Re: Delays in connection to HP3000 via VT-MGR vs TELNET


> Just a couple of comments that hopefully might help.
>
> Based on one of your comments early on
>
> "When using Internet our customers use either the VT-MGR or the TELNET
> protocoll in 'Connection Setup' in Reflection."
>
> If you are using Reflections why are you using Telenet? Wouldn't it be
easier to just emulate one of the regular HP terminal types(using
Reflection). It's been a while since I was on the 3000, I seem to remember
you have to configure the modem port slightly less "generically". But that
is a dim memory, so I may be wrong on that one. If you are able to use the
HP term types though, instead of telnet. That should increase your dial up
responsivness.
>
> If thats not possible, have you tried other telenet clients. There are
vast differences in the assorted clients out there, you definitely do NOT
want to use the generic one that comes with Windows. We currently use Putty
(because its free), but there are plenty of others. Maybe you'd have better
luck with another telenet package?
>
>
>
>
>
> At 07:05 PM 05/16/2001 +0200, you wrote:
> >Hi everybody !
> >
> >This question is not pure PowerHouse but it shows up when using
> >PowerHouse.
> >
> >We have an HP3000 at our office in Gothenburg and our customers are
> >spread out all over Sweden. Our customers mostly connects to the HP3000
> >using the Internet, but when there are problems with Internet or their
> >local network they all have a lifeline using the old technique with
> >direct telephone modem ( 19200 bps ), and that is always working.
> >
> >When using Internet our customers use either the VT-MGR or the TELNET
> >protocoll in 'Connection Setup' in Reflection.
> >Some customers never have problems ( and that is good ).
> >But some customers almost always have problems ( and that is no good ),
> >and so have I myself sometimes when connecting from my home i Halmstad,
> >where I also have an office.
> >
> >When using TELNET there are sometimes delays for every character sent. I
> >myself have seen delays up to 15 seconds but one customer have seen
> >delays up to 40 seconds.
> >This delay is from having pressed one button till the character pops up
> >at the screen.
> >Very annoying.
> >When using TELNET every character ( plus 40 extra characters ), when
> >pressing the button, are sent as a package from the user, to the HP3000
> >and then back to the user before the character pops up at the screen.
> >This TELNET delay became a bit shorter = better ( but not good enough )
> >after having changed 'Retransmission Interval Lower Bound' from default
> >4 seconds to 1 second in NETXPORT.GPROT.TCP in NMMGR.
> >
> >Now to the question:
> >When using VT-MGR there is ALWAYS a delay in some PowerHouse Quick
> >screens, especially one heavily used screen with a primary file and a
> >detail file with many occurrancies and much data on the screen in Find
> >Mode after having read one set of data from having pressed Return to get
> >the next set of data till the new data pops up at the screen.
> > From home with my relatively slow Internet connection this delay is
> >always 13 seconds with VT-MGR in this screen filled with data.
> >Using TELNET this delay is only between 1 and 2 seconds, but as I said
> >TELNET sometimes is too slow in another way.
> >Inside our office in Gothenburg with a fast LAN ( 100 Mbit/sec ) the
> >same screen gives a delay between 4 and 5 seconds with VT-MGR ( when the
> >TELNET delay is under 1 second ), and that is too much isn't it ? And
> >the 13 seconds mentioned above I can't stand. Would you ?
> >When using common MPE commands like LISTF or other, there are no delays
> >at all inside the fast LAN neither with VT-MGR nor TELNET, so why when
> >using PowerHouse ?
> >
> >When using VT-MGR every pressed button is echoed to the screen locally
> >and there is a package sent to the HP3000 only when Return is pressed,
> >so this protocoll should be more efficient, but at least in PowerHouse
> >it seems not to be so efficiant.
> >
> >Does anyone know a prescription to solve this problem ?
> >Some of my customers hate these delays so much that they use the
> >telephone modem instead of Internet, and have to pay the telephone cost
> >for that, when Internet is free when you have a fixed connection.
> >I have asked HP Support, but they have not given me any solution yet.
> >
> >Another queer question is why some other customers NEVER have problems
> >using TELNET.
> >
> >We use MPE 6.0 and  PowerHouse 8.29.D3.
> >
> >Best regards
> >Bengt Johansson
> >AB Thoreb
> >
> >
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>
> Glenn Waters
> North Carolina State University
> College of Veterinary Medicine
> 4700 Hillsborough St., Box 8401
> Raleigh, NC 27695-8401
> Phone: (919) 513-6652
> Fax: (919) 513-6452
> Email: Glenn_Waters@ncsu.edu
>
>
>
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