TELECOM Digest OnLine - Sorted: Re: "Soft Dial Tone" on Uuused lines

Re: "Soft Dial Tone" on Uuused lines

Gerard Bok (
Mon, 14 Nov 2005 16:34:54 GMT

On Sat, 12 Nov 2005 22:46:38 GMT, Michael Chance
<> wrote:

> In article <>,
> says:

>> Some other posters mentioned that an unused land phone line may still
>> offer dial tone to provide for emergency 911 service. Is this a
>> recent offering?

> It's actually relatively old. "Soft Dial Tone" (also known as "Quick
> Dial Tone") was trialed by most of the RBOCs back in the early 1990s
> (I think that it was a Telcordia/Bell Labs brainstorm), but was mostly
> abandoned due to the need for dedicated facilities (a completely
> connected line for every address served) and TNs (SDT/QDT is
> essentially a non-billed, restrictive voice type of service).

So the client uses VOIP and the RBOC supplies 911 access ?

> I'd love to hear what the other RBOCs (Verizon, BellSouth,
> Qwest/USWest) experiences with SDT/QDT were/have been, as well as if
> any of the independents have experimented with it or are currently
> offering it.

Curious too :-)

Kind regards,

Gerard Bok

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