RE: [TCLUG:3624] A new subscriber...

[Peter Lukas <peter@math.umn.edu>]

The 115200 connection speed is really misleading.  This is the speed of
the serial port between your computer and your modem, not your modem and
the remote modem.  To get the more accurate reading, you'll probably need
a better init string (should be in your modem documentation).  So, even
though your status reporters tell you you've connected at 115200bps,
you've probably connected at something much lower.  Think about it; if you
were connecting at 115200bps, you'd be able to download a 1-megabyte file
in about 70 (1 megabyte= 1,000,000 bytes = 8,000,000 bits / 115200 
bits per second = 69.444 secs) seconds. As we all know, that's not really
possible with analog modems (maybe text transmissions with good
compression on your side and "magic bullet" conditions).

Peter Lukas

On Sat, 23 Jan 1999, Barnholtz, Brian wrote:

> I use Xisp and it works great for my connection.  I do have a general
> question though.  I have my modem set for 115200 and it claims to
> connect at that speed, however, my download is anywhere between 3k/sec
> and 9k/sec.  I thought it was impossible to transmit at speeds over 56k
> due to limitations within the phone lines??? Does anyone know what the
> formula for converting k/sec into an actual baud speed?
> 
> Thanks
> 
> Brian
> 
> > -----Original Message-----
> > From:	serge@egel2.med.umn.edu [SMTP:serge@egel2.med.umn.edu]
> > Sent:	Saturday, January 23, 1999 1:14 AM
> > To:	tclug-list@listserv.real-time.com
> > Subject:	Re: [TCLUG:3624] A new subscriber...
> > 
> > hmm, I've never connected over 26400, but I guess the real determining
> > factor is average download speed, for me that's about 3k/sec.
> > 
> > serge
> > 
> > "John J. Trammell" wrote:
> > 
> > > Hello all:
> > >
> > > > The U of M modem pool just plain sucks.  If they offered true ppp,
> > > > you wouldn't need a script to connect.  Plus, rare is a connection
> > > > made higher than 26400.
> > >
> > > Uh, yes the modem pool sucks, but my last 10 connections were
> > > at 115200:
> > >
> > > [root@pico /root]# tail /var/log/modem
> > > chat:  Jan 13 06:54:28 CONNECT 115200
> > > chat:  Jan 14 07:31:21 CONNECT 115200
> > > chat:  Jan 14 23:39:21 CONNECT 115200
> > > chat:  Jan 14 23:43:00 CONNECT 115200
> > > chat:  Jan 19 10:42:12 CONNECT 115200
> > > chat:  Jan 20 23:00:49 CONNECT 115200
> > > chat:  Jan 20 23:01:49 CONNECT 115200
> > > chat:  Jan 20 23:03:00 CONNECT 115200
> > > chat:  Jan 20 23:47:29 CONNECT 115200
> > > chat:  Jan 22 23:09:01 CONNECT 115200
> > > [root@pico /root]#
> > >
> > > >From looking at the connect log, you can see how often things
> > > go haywire though.  And it doesn't show the times the pool is
> > > busy, or doesn't pick up, or my modem gets no carrier, et cetera.
> > > And since when is a connect script an indicator of "false" ppp?
> > >
> > > Regards,
> > > John
> > >
> > >
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