asterisk users - Oct 2006 - Wouldn't Tri-tone detection in Dial() be cool?

To: Whom it may Concern:

Well, it hit me last night as I was falling asleep... Asterisk (in the
app Zapateller)
can emit the tri-tone (you know beep-Beep-BEEP... The number you have
dialed is no longer
in service. Please check the number and...blah, blah)

Well, it occurred to me that, for the sake of orthogonality, wouldn't it
be cool if
Asterisk's Dial function also detected that tone, with an option to
immediately 
hang up if it occurred, with a result code of WRONGNUMBER or NOSERVICE
or whatever?

It also occurred to me that this **might** only be useful to the hated
and dreaded
autodialers that telemarketers use. Even so, it wouldn't hurt me any
more than normal
to have asterisk-based autodialers detect that and get me off their call
lists!

Hah, I'm not trying to imply that I have the skill set right now to
implement this,
nor am I trying to convince anyone right now to do it. The idea just hit
me, and
I wonder if it has already been done somewhere?

murf



-- 
Steve Murphy
Software Developer
Digium
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> I wonder if it has already been done somewhere?
http://www.voip-info.org/wiki/view/Asterisk+cmd+BackGroundDetect

It's not quite Tri-tone detection, and it's not done by the Dial()
commanda, but should yield the same result.
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On Wed, Oct 04, 2006 at 11:35:53AM -0600, Steve Murphy
wrote:
> Well, it hit me last night as I was falling asleep... Asterisk (in
> the app Zapateller) can emit the tri-tone (you know beep-Beep-BEEP...
> The number you have dialed is no longer in service. Please check the
> number and...blah, blah)
Special Information Tones.  Many people don't appreciate that the
three tones are selected from a set of more than three..

http://en.wikipedia.org/wiki/Special_information_tone

and, more deeply:

http://www.telephonetribute.com/signal_and_circuit_conditions.htm
> Well, it occurred to me that, for the sake of orthogonality, wouldn't
> it be cool if Asterisk's Dial function also detected that tone, with
> an option to immediately hang up if it occurred, with a result code of
> WRONGNUMBER or NOSERVICE or whatever?
The ability to detect precise SIT tones on placed calls would be
*really* good.

Cheers,
-- jra
-- 
Jay R. Ashworth                                                jra@baylink.com
Designer                          Baylink                             RFC 2100
Ashworth & Associates        The Things I Think                       
'87 e24
St Petersburg FL USA      http://baylink.pitas.com             +1 727 647 1274

	"That's women for you; you divorce them, and 10 years later,
	  they stop having sex with you."  -- Jennifer Crusie; _Fast_Women_