Presumed RF Interference

Iljitsch van Beijnum iljitsch at
Sun Mar 5 22:59:20 UTC 2006

On 5-mrt-2006, at 23:37, Jon R. Kibler wrote:

>    1) How could a bad ground cause DSL line noise that ia  
> inaudible? Also, the noise is on the telco side, not the LAN side.
>    2) Why would it be blowing DSL routers that are isolated from  
> the LAN by a switch and another router? And, all of this equipment  
> is in the same rack, on the same ground, and on the same UPS.

This makes me think of a place where they used copper lines that ran  
alongside rail road tracks, and each time a train came by the leased  
line modems would go haywire. Electrical trains put a lot of current  
in the ground...

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