Re: 56k modem electronics

On Tue, 27 Sep 2005 08:52:11 -0700, Chris wrote:
> species8350 wrote:
>> I am trying to find a tutorial guide that explains how modem
>> electronics work. So far without success.
>>
>> Have you come across a tutorial. If so, please post the URL
>
> If you need a tutorial on serial modem communications, a good place to
> start would be:
>
> http://www.arcelect.com/rs232.htm
>
> That page is heavy on the general stuff and the cable pinouts, usually
> what you need first. Look at the links on the bottom of the page for
> more pages having to do with serial communications, and phone modems in
> particular.
>
> As always, the Jedi master for serial communications tutorials for
> newbies is Jan Axelson of Lakeview Research, and the Book "Serial Port
> Complete" by that author. You can get it from libraries, Amazon, or
> the Lakeview Research website
>
> http://www.lvr.com/serport.htm
>
> This webpage has links to everything. But if you really want to learn,
> try getting a hold of the book. It's great.
>
> If you could be more specific about your needs, you might get a better
> answer. I'm not really sure what you want.

Sounds like he wants a description of how they shove 56,000 bits per
second of data through a POTS line that's only guaranteed to 3 KHz.

Good Luck!
Rich

.

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