FreeLists / si-list / [SI-LIST] Re: long distance calbe data transferring

[Ray Anderson <reanderson@xxxxxxxxxxxxx>]

Muranyi, Arpad wrote:

>Not knowing much about those DSL chips, but having experience
>with not being able to get DSL service at home because of the
>distance limitations of about 18000 feet 3.4 miles (about 5.5 km)
>I wonder whether Wang will be able to use these chips for a 7 km
>design...
>
>Arpad Muranyi
>Intel Corporation
>  
>
Don't know, but Wang says he needs to have a 1e-5 or better BER. That is 
a pretty loose spec. I believe DSL links are speced at about 1e-7 or 
thereabouts. If he can live with a degraded BER then maybe the DSL chip 
solution could work... (or not). Not sure how fast the BER will fall 
off  as link loss increases without doing the numbers or looking at a 
waterfall curve. (If there is FEC involved the fall off will be steeper).

-Ray


-Ray
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