Why are 56K Modems Limited to 44.4K

From: Justin J.H.C. Schubert (jjhcs1_at_shaw.ca)
Date: 01/20/05 

Date: Thu, 20 Jan 2005 23:47:42 GMT

And you will Never achieve 56K on any Modem.

All you can Hope to do is stabilize your current speed.

    No matter How you set it.......it is well known that you can Tweak the
Modem but using the F1 or F&1 string by default is the best in my Opinion
    If you fiddle with it too much you will have None connect or Failure to
connect.
Ok lets say your connection from your server is Rated at 33.3Kb/s you will
get at most 28.8Kb/s and at the Least 14.4Kb/s or Heaven forbid 8.8Kb/s.
    ALL PROVIDERS!!! Recommend that you set your Baud Rate one Kb/s higher
Example 33.3Kb/s set to 44.4Kb/s
and so on.
    I have been told by Providers and I have found this our my self the Most
you will get out of a USRobotics 56Kb/s Ver 9.0 Voice/Fax modem (or any
other model)is 44.4Kb/s unless your with in 50 Feet of a FOL exchange......
Simple fact of two Wire Copper and the Fact that you are Converting a
Digital Signal from the Computer to analog tone pulses sending them Over a
Phone line to your Server and the Server dose the opposite.....this all
slows the signal.......you WILL NEVER reach 56Kb/s on a modem except by some
enormous Fluke......Ok
    You can only hope to Stabilize the speed if you are running at 28.8Kb/s
you need to Break down your String the Default string is all well and good
but it has Data compression on and Flow Error controls on which you do not
need...
I have set the string to F&1 or F1 or Factory 1 and Factory 2 your Modem
Book will have more detailed info... Data comp and Flow Control are the
slowdowns in most cases you will have to experiment with your modem but most
of the best strings commands are short.

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  • Re: Why are 56K Modems Limited to 44.4K
    ... >> And you will Never achieve 56K on any Modem. ... >> Phone line to your Server and the Server dose the opposite.....this all ... >> you need to Break down your String the Default string is all well and ... >> but it has Data compression on and Flow Error controls on which you do ...
    (microsoft.public.windowsxp.help_and_support)
  • Re: Why are 56K Modems Limited to 44.4K
    ... > Modem but using the F1 or F&1 string by default is the best in my Opinion ... > Ok lets say your connection from your server is Rated at 33.3Kb/s you will ... > but it has Data compression on and Flow Error controls on which you do not ...
    (microsoft.public.windowsxp.help_and_support)