Geneva
John J. Mills
switzerland. I'm keen to learn about
experiences and throughput vs V34 dial up
before committing my meagre funds to the PTT.
regards,
John M.
Marc S. Paller
In article <3u848q$i...@badboy.iprolink.ch>, <jmi...@iprolink.ch> writes:
> Path:
pubxfer.news.psi.net!psinntp!psinntp!psinntp!rutgers!news.iag.net!usenet.eel.uf
l.edu!hookup!news.kei.com!simtel!swidir.switch.ch!badboy.iprolink.ch!usenet
> From: jmi...@iprolink.ch (John J. Mills)
We worked on a project for a large non-profit, one of their largest facilities
is in Geneva, and they are using ISDN from Geneva to connect at 384 kbps (3
ISDN lines) to New York City.
Data transfer is a tricky situation. Our experience and testing with a number
of organizations has shown us that comparing ISDN with V.34 is an unfair
comparison, both on throughput and cost. ISDN can get you a maximum real
throughput of data through the pipe (irregardless of compression) of 128 kbps.
While a V.34 modem can only get you a maximum throughput of 28.8 kbps, also
irregardless of compression.
What this means is that transmitting the same file using the same compression
or no compression on both the ISDN line or V.34 modem, the data will be
transfered just under 5 times faster with ISDN.
However, if you plan on making international calls using your V.34 modem and
even in some cases just long distance calls, your throughput on the V.34 modem
may fall from 28.8 kbps to 14.4 or even 9.6 because of noise and other factors
on the analog phone line, routing and so forth.
With an ISDN line you may not always reach the other party at 64 kbps,
sometimes you get there at only 56 kbps, which means you can have an
aggregated bandwidth of 112 kbps to 128 kbps of real throughput.
Next is the comparison of analog telephone usage charges versus ISDN. This is
usually the make or break. Unless the usage comparision shows that ISDN costs
are no more than 4 times that of analog, then ISDN may be chosen.
There are, of course, those people that need to move data in a hurry an prefer
ISDN because it gets their data there faster and in the case where they have
to transmit information to many different locations or many different files,
they perfer ISDN over V.34 modem as long as ISDN is available at the other
location.
Last but certainly not least, if we were transmitting a 500 kbyte file, by the
time the v.34 modems finally got a connect with each other (30 to 40 seconds
from the moment we hit dial), the file would have already been transmitted
using ISDN. To get a connect with ISDN normally occurs in under 2 seconds,
faster if local.
If we can be of any further service...
1-800-ISDN-TO-U
Markus Baertschi
I installed an ISDN line in my home in last autumn for this reason.
As I had already two phone lines the ISDN lines were not much more
expensive (+sFr 11.-/month). At the time I thought I'd use ISDN
immeditely and often, but until today I haven't gotten any ISDN
hardware. Mostly because there was no Internet provider supporting
it and hardware was quite expensive.
As there is Iprolink now, and hardware costs are coming down
this might change in the near future.
Markus
John J. Mills (jmi...@iprolink.ch) wrote:
: Is there anyone using dial up ISDN in Geneva
: switzerland. I'm keen to learn about
: experiences and throughput vs V34 dial up
: before committing my meagre funds to the PTT.
: regards,
: John M.
--
---
Markus Baertschi Phone: ++41 (22) 901-0101 (++41 (22) 791-5563)
Geneva, Switzerland Mail: mar...@oahu.cern.ch (ma...@vnet.ibm.com)
Rap's Law of the Inanimate Reproduction:
If you take something apart and put it back together enough times,
eventually you will have two of them.
John J. Mills
that's very helpful. I'm convinced it's the
way to go and in Switzerland (the land of the
expensive) ISDN is a bargain - the monthly
charge is fractionally more than for POTS and
gives three times the functionality and many
times the speed.
The cost of international calls is 30-50%
more than for POTS calls but that's fine for
data given the speed difference (maybe not
for checking email etc ... but that's why
there are modems)
The real issue is going to be whether the
internet service providers have enough
bandwidth to make it worthwhile.
My other concern is what equipment works well
and is accepted by the PTT .... ie where is
the price-performance sweet spot? The PTT is
pretty calm about analogue equipment being
connected without their blessing but nervous
about someone messing up their Swissnet
system (ie ISDN)
regards,
Simon Poole
..
>that's very helpful. I'm convinced it's the
>way to go and in Switzerland (the land of the
>expensive) ISDN is a bargain - the monthly
>charge is fractionally more than for POTS and
>gives three times the functionality and many
>times the speed.
But you -do- realize that you pay for -every- call,
regardless if it was sucessful or not?
--
EUnet AG Simon Poole
Zweierstrasse 35 +41 1 291 45 80
8004 Zuerich +41 1 291 46 42
John J. Mills
at all. My plan is to use the ISDN purely
for modem calls to my ISP. The extra USD30 a
month I pay for ISDN doesn't seem much if it
more than doubles my bandwidth for looking
around the WWW. I'll admit that this is
little more than an indulgence in man's
perennial pursuit of faster, higher and
better.
I will discuss this charge for no-connect
calls with the PTT ... and you know how
useful that can be <smile>