Jay R. Ashworth wrote:
*snipped
The ability to detect precise SIT tones on placed calls would be
*really* good.
actually it is damn near impossible.
in a perfect world, if all the switch providers where adhering to ITU
spec on SIT's,
then it would be possible. they sad part is (at least out here in
pacbell/sbc/now att
land) west coast/US), they don't give a *blank* about inband SIT info.
(note: inband)
i actually went through the whole process of tracking down which
switches had down
right bad recordings back in 2004, and was able to get them to re-record
(or fix) the
SIT's.
after the first round of fixes, i provided another batch of like 150+,
and at that point
they would not fix anymore.
so, goodluck with 'precise SIT detection' (inband)
the below link is data on the tests and such, even a couple screenshots
showing the
difference in amplitude from a mere whisper, to near eardrum damage levels.
http://www.dynx.net/SBC/
(this is why conversion to PRI (for outofband info) is the path we took)
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