🚀 go-pugleaf

"Noozer" <dont.spam@me.here> wrote in
news:E5PXh.126796$DE1.126581@pd7urf2no: 

>> I realize whether the data transmitted is raw, zipped,
>> rar'd, yEnc'd or mimed doesn't matter, but I do not
>> believe bitrate can exceed 56KB (if that) - and most of
>> the others in the thread seem to feel the same way.
> 
> I think folks are arguing two different things here...
> 
> Physically, a 56k modem can download at max, with a perfect
> line at 53kbit per second. (53k here in Canada and US. Not
> sure if other areas limit power the same as here). That is
> the raw data between modems. 
> 
> Data can be transmitted THROUGH the modem much faster if
> the data is easily compressed WITHIN the modem (yes, dialup
> modems do compression on the fly). For example, send a
> large text file full of space characters only and the modem
> will squash that data BEFORE putting it on the line to the
> other end. While the data stream never goes above the
> 53kbps limit between the modems, the actual data throughput
> is much higher. 
> 
> If you want to test efficiency, create a text document,
> about one megabyte in size, that contains nothing but space
> characters. This file contains 8388608 bits of data. After
> adding a start bit, parity bit and stop bit you end up with
> 11534336 bits of data. At 100% efficiency (which will never
> happen), this file could be dowloaded in 217.6 seconds.
> 
> Zip this file using your compression ratio of choice. This
> file should be a LOT smaller than the original.
> 
> At this point you should have "bigfile.txt" and
> "bigfile.zip" 
> 
> Put both of these files onto webspace on the internet
> somplace and try to download them with your 56k modem. What
> kind of download speeds and download times do you actually
> see? 
> 
> ... and there is one other item to take into consideration
> here. A 56kbit modem will ONLY run faster than 33.6kbit if
> the answering end of the system is digital. It can't be an
> analog phone line, etc. This means you'll never get 56kbit
> dialing between PC modems. 

Nice to see a little sanity interjected into the discussion.
Thank you.


-- 
Disagreements and the usual insults expected and welcomed.