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Article #2862

Re: Different Connection Speeds

#2862
From: rickman
Date: Mon, 14 Oct 2002 06:16
48 lines
3422 bytes
BluesHead wrote:
> 
> Firstly, thanks to all who responded.
> The modem connected to the PC is an Aeries one I got from watford.co.uk a
> few years ago which I believe uses Rockwell chips. The driver supplied was a
> nightmare to setup - Win98 kept finding "new hardware" no matter how the
> driver was installed. I have always used the windows standard 56K driver
> with "w2"  entered into the "extra settings" which I read somewhere would
> give the true speed rather than the speed the Processor communicated with
> the modem.
> http://homepage.eircom.net/~leslie/testpage.htm
> returns Your throughput is typical of a connection speed of around
> 26,400bps. The system tray Icon is showing a connection speed of 28800.
> The modem in the Lap Top is a Toshiba V90.  The System tray Icon shows
> connection speed of 45333 yet the same test page returns Your throughput is
> typical of a connection speed of around 36000.
> Both are connected to the same BT line socket (one at a time obviously) and
> the modem leads appear identical although they are wired differently as they
> are not interchangable.
> I hav to admit it didn't bother me that much until I seen that the LT was
> getting a much higher connection.  Before this I assumed that it was poor
> line conditions.
> Any suggestions ?
> 

I don't pay much attention to the "connection speed" this web site
calculates.  If I load the page and watch the status lights for the
connection in the system tray, I see the receive light flash off a
couple of time.  This is enough to goof up the speed.  I think the
calculation also rounds down when figuring out the modem connect speed.  

Repeat the test a few times by reloading the page and use the highest
throughput number.  Then multiply by 8 to get a bit rate.  This will be
lower than your actual connect rate due to the "dead" times when no data
is being transferred.  

-- 

Rick "rickman" Collins

rick.collins@XYarius.com
Ignore the reply address. To email me use the above address with the XY
removed.

Arius - A Signal Processing Solutions Company
Specializing in DSP and FPGA design      URL http://www.arius.com
4 King Ave                               301-682-7772 Voice
Frederick, MD 21701-3110                 301-682-7666 FAX
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From: rickman <spamgoeshere4@yahoo.com>
Newsgroups: alt.comp.hardware,freeserve.help.modems
Subject: Re: Different Connection Speeds
Date: Mon, 14 Oct 2002 02:16:18 -0400
Organization: Arius, Inc
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