Path: utzoo!mnetor!uunet!seismo!rick
From: r...@seismo.CSS.GOV (Rick Adams)
Newsgroups: comp.dcom.modems
Subject: Trailblazer throughput on international dialup circuits
Message-ID: <44232@beno.seismo.CSS.GOV>
Date: 29 Jan 88 04:39:49 GMT
Organization: Center for Seismic Studies, Arlington, VA
Lines: 14
Keywords: great
The connection between uchdcc (in Chile) and uunet is now via
a Telebit Trailblazer Plus modem.
Even given the horrible phone line quality between the USA and
Chile, we are getting 8-9 kbps end to end throughput running
uucp's 'g' protocol with the protocol spoofing enabled.
I was hoping for 5-6 kbps given the horrible lines, but this
is good enough!
(This makes Trailblazers cheaper that X.25 for international calls
my my rough calculations)
---rick
Path: utzoo!attcan!uunet!rick
From: r...@uunet.UU.NET (Rick Adams)
Newsgroups: comp.dcom.modems
Subject: more real data on trailblazers on international connections
Message-ID: <14030@uunet.UU.NET>
Date: 24 May 88 15:24:06 GMT
Organization: UUNET Communications Services, Arlington, VA
Lines: 10
This is real throughput from the USA to:
England 7000 bps
Chile 4000 bps
Argentina 4500 bps
Data for Japan and India(!) coming soon.
---rick
Path: utzoo!attcan!uunet!amdahl!ames!mailrus!ncar!noao!asuvax!hrc!dan
From: d...@hrc.UUCP (Dan Troxel VP)
Newsgroups: comp.dcom.modems
Subject: London England and modem speeds
Keywords: How fast can they be? Problems?
Message-ID: <311@hrc.UUCP>
Date: 29 Sep 88 21:52:56 GMT
Organization: Handwriting Research Corp. - Phoenix, AZ
Lines: 17
The company I work for is soon to open a franchise in London, England.
We will be communicating back and forth sending about 35,000 bytes
worth of compressed data. This could be anywhere from 5 to 20 a day.
I have heard that the highest baud rate to communicate out of London
is 1200 baud.
o Is this true?
o If so, WHY?
o If so, is there a different way to send the data in a
speedily fashion?
--
Dan Troxel VP of Computer Operations @
Handwriting Research Corporation - 2821 E. Camelback Road Suite 600
Phoenix, AZ 85016 WK 1-602-957-8870 HM 1-602-435-1240
UUCP : asuvax!hrc!dan
Path: utzoo!attcan!uunet!husc6!bloom-beacon!apple!voder!pyramid!csg
From: c...@pyramid.pyramid.com (Carl S. Gutekunst)
Newsgroups: comp.dcom.modems
Subject: Re: London England and modem speeds
Keywords: How fast can they be? Problems?
Message-ID: <41536@pyramid.pyramid.com>
Date: 1 Oct 88 20:06:33 GMT
References: <311@hrc.UUCP>
Reply-To: c...@pyramid.UUCP (Carl S. Gutekunst)
Organization: Pyramid Technology Corp., Mountain View, CA
Lines: 24
In article <3...@hrc.UUCP> d...@hrc.UUCP (Dan Troxel VP) writes:
>I have heard that the highest baud rate to communicate out of London
>is 1200 baud.
And that only on *good* days. I dunno why, but dialup to London is awful. The
Bell 212A and V.22 modems we've tried were erratic, and V.22bis was out of the
question. Even the TrailBlazer has never worked right. (One of these days we
may goad Telebit into finding out why.) This is a sharp contrast to Australia,
for example, which works exceptionally well with just about anything; and
Chile and Argentina, where most modems won't work at all but the TrailBlazers
get over 500 cps. Then again, dialup to Germany is terrible, too. Maybe the
trans-Atlantic phone links are just outdated?
>o If so, is there a different way to send the data in a speedily fashion?
X.25 Public Data Network. We have a 9600bps Telenet line here, and most places
we call in the U.K. have 9600bps lines to British Telecomm Packet Switch
Service (PSS). We get a consistent data rate in excess of 500 characters per
second. Unfortunately, X.25 is hideously expensive; Telenet is charging us
$1400/month, plus $12 per 64K and $12 per hour of connect time. If you work it
out, all you need to maintain is a *reliable* 80 cps on a modem to break even.
If the TrailBlazer worked, we'd completely adandon X.25 to the U.K.
<csg>
Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!vsi1!altnet!uunet!seismo!rick
From: r...@seismo.CSS.GOV (Rick Adams)
Newsgroups: comp.dcom.modems
Subject: Re: London England and modem speeds
Summary: Suffolk
Keywords: How fast can they be? Problems?
Message-ID: <44419@beno.seismo.CSS.GOV>
Date: 5 Oct 88 02:44:17 GMT
References: <311@hrc.UUCP>
Organization: Center for Seismic Studies, Arlington, VA
Lines: 4
We manage to get 7-8 k bps between Washington, DC and Suffolk, England
with Telebit Trailblazer modems. I would expect traffic to London to be similar.
---rick
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