Jeremy Smyth wrote:
> > > Yes, but IIRC a V.90 connection is still at 9600 baud,
> > regardless of how
> > > many bps you're getting - the baud rate stays the same.
> > If baud is a measure of the number of signal changes per second,
> > how is it possible to send a bit without changing the signal,
> > whether FM, or AM?
>> Compression. You've heard of V32, V32FC, V32bis, V34, V34+, V90, etc.
> They're all different ways of squishing up to 56kbits into a bandwidth that
> can only realistically support 8KHz, i.e. 8K signal changes per second. Baud
> is physical signal changes, bps is what you have after decompression.
>> Like you can store 20MB of files in a .tgz that's only 8MB. You haven't lost
> any information, it's just compressed.
I see clearly now
But I still don't understand why my home phone line is dead reliable at 33k
but quite flaky at 56k. If it were only compression that was producing the
increased bandwidth, then surely the reliability should be consistent?
> Irish Linux Users' Group: ilug at linux.ie>http://www.linux.ie/mailman/listinfo/ilug for (un)subscription information.
> List maintainer: listmaster at linux.ie
John Allen, Email: john.allen at orbiscom.com
Orbiscom Ltd, Web: http://www.orbiscom.com
3 Sandyford Park, Phone: +353-1-2945111
Sandyford Industrial Estate, Mobile: +353-86-2315986
Dublin 18. Fax: +353-1-2945119
Maintained by the ILUG website team. The aim of Linux.ie is to
support and help commercial and private users of Linux in Ireland. You can
display ILUG news in your own webpages, read backend
information to find out how. Networking services kindly provided by HEAnet, server kindly donated by
Dell. Linux is a trademark of Linus Torvalds,
used with permission. No penguins were harmed in the production or maintenance
of this highly praised website. Looking for the
Indian Linux Users' Group? Try here. If you've read all this and aren't a lawyer: you should be!