nanog mailing list archives
Re: DSL line stealing when there is no tone - DANGER - Operational content
From: Daniel Senie <dts () senie com>
Date: Wed, 16 May 2001 17:14:35 -0400
At 04:46 PM 5/16/01, 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.
Better: a chip with a recorded voice: "This pair is in use" interspersed with a tone.
While present baseband signalling may be unable to handle such, it'd be useful if future ones purposely avoided the zero to 5kHz spectrum to allow for such a mechanism. Clearly the telco workers have demonstrated the absolute necessity for such a facility.
----------------------------------------------------------------- Daniel Senie dts () senie com Amaranth Networks Inc. http://www.amaranth.com
Current thread:
- Re: People who purchase unproven technologies to support their Business, and whine about it. RE: To CAIS Engineers - WAKE UP AND TAKE CARE OF YOUR CUSTOMERS, (continued)
- Re: People who purchase unproven technologies to support their Business, and whine about it. RE: To CAIS Engineers - WAKE UP AND TAKE CARE OF YOUR CUSTOMERS Dan Hollis (May 14)
- Re: People who purchase unproven technologies to support their Business, and whine about it. RE: To CAIS Engineers - WAKE UP AND TAKE CARE OF YOUR CUSTOMERS John Payne (May 14)
- Re: People who purchase unproven technologies to support their Business, and whine about it. RE: To CAIS Engineers - WAKE UP AND TAKE CARE OF YOUR CUSTOMERS Hunter Pine (May 14)
- RE: People who purchase unproven technologies to support their Business, and whine about it. RE: To CAIS Engineers - WAKE UP AND TAKE CARE OF YOUR CUSTOMERS Joe Marr (May 14)
- RE: People who purchase unproven technologies to support their Business, and whine about it. RE: To CAIS Engineers - WAKE UP AND TAKE CARE OF YOUR CUSTOMERS Steve Schaefer (May 14)
- The DSL business model Steve Sobol (May 14)
- DSL line stealing when there is no tone - DANGER - Operational content Alex Bligh (May 14)
- Re: DSL line stealing when there is no tone - DANGER - Operational content Steve Schaefer (May 17)
- Re: DSL line stealing when there is no tone - DANGER - Operational content Greg Maxwell (May 17)
- Re: DSL line stealing when there is no tone - DANGER - Operational content Alex Bligh (May 17)
- Re: DSL line stealing when there is no tone - DANGER - Operational content Daniel Senie (May 17)
- Re: DSL line stealing when there is no tone - DANGER - Operational content John Fraizer (May 17)
- Re: People who purchase unproven technologies to support their Business, and whine about it. RE: To CAIS Engineers - WAKE UP AND TAKE CARE OF YOUR CUSTOMERS Bill Woodcock (May 14)
- Re: People who purchase unproven technologies...DSL mike harrison (May 14)
- Re: People who purchase unproven technologies...DSL Shawn McMahon (May 14)
- Re: People who purchase unproven technologies...DSL Greg Maxwell (May 14)
- Re: People who purchase unproven technologies...DSL Daniel Senie (May 14)
- Re: People who purchase unproven technologies...DSL Wojtek Zlobicki (May 14)
- Re: People who purchase unproven technologies...DSL Alex Rubenstein (May 14)
- Re: People who purchase unproven technologies...DSL Dan Hollis (May 14)
- Re: People who purchase unproven technologies to support their Business, and whine about it. RE: To CAIS Engineers - WAKE UP AND TAKE CARE OF YOUR CUSTOMERS Wojtek Zlobicki (May 14)