Olin Lathrop wrote:
> solarwind wrote:
>   
>> * First question. How does this work? How do the signals NOT interfere
>> with each other on the line?
>>     
>
> I didn't follow the link, but DSL and voice are separated in frequency
> space.  This is a lot like why multiple radio stations don't interfere with
> each other even though they transmit over the same medium.
>
>   
>> * It appears that my phone line has only two wires. Is this a twisted
>> pair?
>>     
>
> Yes.
>
>   
>> I'm guessing not because I don't see a third ground line.
>>     
>
> "Pair" means 2.
>
>   
>> * If it's not twisted pair, how is ADSL able to operate at such high
>> speeds (10 mbit/s) reliably?
>>     
>
> I didn't think it went that high
IIRC ADSL 1 caps out at 8, adsl2+ caps out at 24 (I don't think i've 
ever seen 2 without the +).  the highest i've seen in practice is about 11.

> After a mile or two (?) the phone company doesn't even offer
> DSL because they know the signals wouldn't get there with sufficient
> signal/noise ratio.
IIRC in the UK BTs limit is something like 5 miles, of course you won't 
get brilliant speeds at that distance.
>   Look at the fine print and you'll see a big gap between
> the hype and what you're actually guaranteed to get.
>   
They basically won't gaurantee anything much, thats the price you pay 
for using cheap consumer grade internet connection.
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