| From: | Neil Bothwick |
| Date: | 27 Jul 2001 at 08:36:37 |
| Subject: | Re: Different modem performances & AA23 |
Nicholaus Darley-Jones said,
> Hello Neil
>> 115200 is *not* sufficient for highly compressible data, like text. The
>> fact that a file full of normal text transferred no slower than an
>> "empty" (and therefore almost infinitely compressible) file indicated
>> that the modems were already delivering text faster than the serial port
>> could handle.
> This is what I was thinking. I am not sure whether this modem is handling
> compressed data as well as other modems. I know that the speed difference
> is not 'huge' but I have tried fiddling with the modem settings to see if
> it can handle compression. I tried the '&K2' setting in the init string
> but it seemed to be much slower as well as the 'data compression' setting
> in MiamiDX.
It's generally a bad idea to set and compression in the modem's init
string.
> Is there any way of testing if the modem can handle this? What results
> should I expect?
Upload an archive file, something non--compressible to your ISP's FTP
server (these are local so only the modem speed affects the transfer).
Then upload a text file of similar size containing nothing but spaces.
Compare the download times for the two files, the file of spaces should
come down at 10KB/s, the limit of your serial connection.
Cheers
Neil
If we aren't supposed to eat animals, why are they made of meat?
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