North American Network Operators Group
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Re: Presumed RF Interference

  • From: Iljitsch van Beijnum
  • Date: Sun Mar 05 18:00:40 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...