[37602] in North American Network Operators' Group
Re: DSL line stealing when there is no tone - DANGER - Operational
daemon@ATHENA.MIT.EDU (John Fraizer)
Thu May 17 14:05:44 2001
Date: Thu, 17 May 2001 14:02:29 -0400 (EDT)
From: John Fraizer <nanog@Overkill.EnterZone.Net>
To: Greg Maxwell <gmaxwell@martin.fl.us>
Cc: nanog@merit.edu
In-Reply-To: <Pine.GSO.3.96.1010516164452.5312H-100000@da1server>
Message-ID: <Pine.LNX.4.21.0105171401300.8218-100000@Overkill.EnterZone.Net>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Errors-To: owner-nanog-outgoing@merit.edu
On Wed, 16 May 2001, Greg Maxwell wrote:
>
> 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.
>
>
I predict great great headache for the same person. Typically, the
line-tech is looking for those tones and this will make your lines even
more likely to be fudged with.
---
John Fraizer
EnterZone, Inc
