[asterisk-users] Wouldn't Tri-tone detection in Dial() be cool?

[Richard Lyman]

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)