[SATLUG] Wifi (Bandera County)

[Brad Knowles]

On 9/2/07, Ed wrote:

>  Actually, they're both DSL and ISDN.  They're no more modems than is a
>  "cable modem," which is also a TA...

No, actually they're both modems, in the true sense of the word. 
 From the Wikipedia article on DSL at 
<http://en.wikipedia.org/wiki/Dsl>, I quote:

	Some variants of DSL connections, like ADSL and very high speed
	DSL (VDSL), typically work by dividing the frequencies used in
	a single phone line into two primary 'bands'. The ISP data is
	carried over the high frequency band (25 kHz and above) whereas
	the voice is carried over the lower frequency band (4 kHz and
	below). (See the ADSL article on how the high frequency band is
	sub-divided). The user typically installs a DSL filter on each
	phone. This filters out the high frequencies from the phone, so
	that the phone only sends or receives the lower frequencies (the
	human voice), creating two independent 'bands'. Thus the DSL
	modem and the phone can simultaneously use the same phone line
	without interfering with each other.

And yes, this article is actually accurate.  I'm not just blindly 
quoting Wikipedia without knowledge of how the technology works, I'm 
just looking for a description I can hand out that will hopefully be 
better written than what I can crank out off the top of my head at 
10:45pm after having worked my ass off all day trying to get the new 
house ready for us to move into tomorrow.

-- 
Brad Knowles <brad at shub-internet.org>
LinkedIn Profile: <http://tinyurl.com/y8kpxu>