On Wed, 16 May 2001, Steve Schaefer wrote:
The main reason not to stick a tone on the DSL line is that the line coding (2B1Q) used by SDSL uses the baseband (low frequency part of the spectrum).
For line codings that don't use the baseband (CAP, DMT and variants like G.lite), the DSLAM (telco central office DSL equipment) is always set up so that the DSL can be combined with a voice circuit over the same pair, so it still doesn't put a tone on the line.
I predict great profits for the first person to duct tape 100 'tracer tone-generators' into a 23 inch rack with 48v DC power source. -- The comments and opinions expressed herein are those of the author of this message and may not reflect the policies of the Martin County Board of County Commissioners.