Modem speeds

[Ted Gould]

--=-BeVhVWEkdsuzpPZZlwSC
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable

> What in the  wide world of talk is 'cross'ing it? When did it become a=20
> Catholic term? Why did the talk cross the road? To hear itself speak!=20
> Hardee-Harr-Harr!

Basically electrical and magnetic signals are very related.  If you send
an electrical signal down a wire there is a magnetic effect of that
signal.  Thus, if you apply a magnetic signal to a wire, you can induce
an electrical one.

So if you put to wires next to each other, and a signal down one, some
of that signal will show up on the second wire.  By increasing the level
of the first signal, the second one increases in size.

Basically, if your modem put out too much power, it would cause it's
signal be seen at too great a level on other lines.

This is how a lot of phone tapping (atleast on copper) is done.  With
something called an inductive pickup, where they are reading the
magnetic signal on the outside of the wire.  This is also the reasons
that network cables are 'twisted-pair', it cuts down on noise.  Also
differential SCSI, etc...  This is a big deal in computer hardware.

		Have fun,
			Ted

--=-BeVhVWEkdsuzpPZZlwSC
Content-Type: application/pgp-signature; name=signature.asc
Content-Description: This is a digitally signed message part

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

iEYEABECAAYFAj3ZEcwACgkQLE335pRPGp0T8QCeI3B92bpO3mlVp2HLeNqtRhCt
1N0Ani0yWjmOsg7MGuJ/jZk4uEPhenYJ
=kqlY
-----END PGP SIGNATURE-----

--=-BeVhVWEkdsuzpPZZlwSC--