[MLB-WIRELESS] adsl protocol question... - off topic

[Ryan Abbenhuys]

http://computer.howstuffworks.com/dsl.htm



>Hi all,
>
><mode = de-lurk>
>does anyone know how the signalling and data transmittion codecs work for 

>adsl cable and satellite?
>
>e.g.
>The line b/w your house and the exchange is capable of telephone at low  
>frequencies and adsl at high frequencies.  Depending on your adsl plan you
 
>get a feed that is somewhat lower in speed than the maximum... which I  
>presume is somewhere around 1.5 Mbps??? (ignoring local conditions and  
>distance to exhchange effects - I'm interested in the max possible output 

> from the exchange.)
>
>most of us get much less than the 1.5 Mbps.  so how is that achieved. Is  
>it something like a limited frequency band that is used, such that there  
>is, for want of a better term, some dark cable available for another  
>transmitter to access, or is it a codec change... e.g. lower speed, more  
>error checking, greater distance, but still using all the available  
>frequency band (or more likely, using all the frequency band,  
>inefficiently, but not so as one can share).
>
>basically I want to know if 2 service providers can utilise the copper  
>pair coming ot your home...
>
>
>
>-- 
>   ########## Paul van den Bergen,
>#  #       # & Anja van den Bergen
>####  #    # Glen Waverley VIC 3150 Australia
>   #   ###### gabpaul at melbpc.org.au
>   #   #      ph: +613 9886 3160
>   #####      mob: 042 886 3160
>
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