North American Network Operators Group
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Re: DSL line stealing when there is no tone - DANGER - Operational content
- From: Greg Maxwell
- Date: Wed May 16 16:53:51 2001
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.
--
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