Topband: Internet access via power lines reborn in Europe

[John Kaufmann]

This European proposal seems to stand in contrast to the precedent set by 
high-speed DSL.  As many of you know, DSL uses radio frequency signalling 
techniques over telephone lines.  The bandwidths depend on the speed of the 
service, but the spectrum of wideband DSL can extend up to several 
MHz.  There is obviously the same potential for interference 
here.  However, the technical specs I have seen for DSL call for deep 
spectral notching (i.e. filtering out) of  the DSL signal specifically 
around the amateur bands to prevent interference to hams.   I suspect hams 
were involved in development of these specs :-)

The subject of DSL interference was brought up on this reflector some time 
ago and as I recall there were only a few responses, including mine, and 
none indicated any interference problems. I am also not aware of any 
interference being reported elsewhere-- anybody have any information to the 
contrary?

73, John W1FV