1. Ask your telco, they probably have them, but you may have some difficulty
in finding somebody at your telco that has a clue about what you are talking
about. You can find some lists doing some google searches for the numbers
and hope to get lucky... but as far as I know, there is no "official"
repository for these test numbers.
2. I wouldn;t use an overseas number personally... those calls are certainly
getting encoded / decoded and reencoded several times, and more than likely
getting compressed, all of which is going to have an impact... it *might* be
better than nothing... but i would expect very poor results.
3. You are right, you can';t really just make one yourself from scratch, you
need a source that has already been tuned properly to use as a reference for
creating your own.
--
Matt Watson
On Thu, Dec 11, 2008 at 11:01 AM, Olivier <oza-4h07 at myamail.com> wrote:
> Hi,
>
> I would like to tune rx/tx gains using dahdi-monitor for a system which
> will be connected to french PSTN.
> I'm not aware of any public phone number in France I could call to get
a
> "normalized 1004Hz signal".
>
>
> My questions are :
> 1. Does such numbers exist ? Is there a directory somewhere listing some of
> them ? Do you think regulations could make providing such numbers mandatory
> for (some) Telcos ?
> 2. Does it make to use a number aboard instead if I can't find any
local
> ones ? I don't think so, but I prefer to check.
> 3. I can't imagine a process allowing me to create my own (chicken and
egg
> problem). Is it correct ?
>
> Regards
>
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