asterisk users - Mar 2009 - "The number you have called has been disconnected or is no longer in service"

This sort of message is usually preceded by some magic tones that
allow direct marketing application to immediately drop a call to a
dead phone number.

What is the proper terminology for the tones?

Where can I find information about how this is implemented?

-- 
Drew Einhorn

Quoting "drew einhorn" <drew.einhorn at gmail.com>:
> This sort of message is usually preceded by some magic tones that
> allow direct marketing application to immediately drop a call to a
> dead phone number.
>
> What is the proper terminology for the tones?
Special Information Tone.
> Where can I find information about how this is implemented?
In Asterisk, the Zapateller application is used to generate this.

-- 
Phil Reynolds
mail: phil-asterisk at tinsleyviaduct.com
Web: http://www.tinsleyviaduct.com/phil/
Waltham 66, Emley Moor 69, Droitwich 79, Windows 95


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On Mar 19, 2009, at 4:34 PM, drew einhorn wrote:
> This sort of message is usually preceded by some magic tones that
> allow direct marketing application to immediately drop a call to a
> dead phone number.
>
> What is the proper terminology for the tones?
>
> Where can I find information about how this is implemented?
>
> --  
> Drew Einhorn


As noted previously, they're "Special Information Tones" and you
can
create your own with the "PlayTones" function in Asterisk if
they're
not already specified in indications.conf (many large country settings  
already exist).  Here are the frequency specifications for the ones in  
North America:

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

and for the rest of the world:

http://www.3amsystems.com/wireline/tone-search.htm?start=0&kTone=40

JT

---
John Todd                       email:jtodd at digium.com
Digium, Inc. | Asterisk Open Source Community Director
445 Jan Davis Drive NW -  Huntsville AL 35806  -   USA
direct: +1-256-428-6083         http://www.digium.com/

On Thu, Mar 19, 2009 at 5:39 PM, Phil Reynolds
<phil-asterisk at tinsleyviaduct.com> wrote:
> Quoting "drew einhorn" <drew.einhorn at gmail.com>:
>
>> This sort of message is usually preceded by some magic tones that
>> allow direct marketing application to immediately drop a call to a
>> dead phone number.
>>
>> What is the proper terminology for the tones?
>
> Special Information Tone.
>
>> Where can I find information about how this is implemented?
>
> In Asterisk, the Zapateller application is used to generate this.
>
Actually what I am trying to understand how the dialing system reacts
to these tones, and whether there is just one "Special Information
Tone"
or whether there is a whole family of them with a variety of semantics.

Now that I know the terminology, I will have more luck googling.

-- 
Drew Einhorn

But from what I understand of SS7 it can be traced back with the 
cooperation of the carriers. I know we have traced a call setup (AMPS) 
across 3 carriers before.

Cary Fitch wrote:
> And getting a connection
> to a voice mailbox requires a 3 -way handshake so we can record the ip
> number the call originated from.  So it should be possible to generate
> a dns black list similar to the ones used for email spam.
>
> [Cary Fitch] 
> The problem is these are coming in from the PSTN and the SS7 link is back
to
> the local switch/tandem, not to the originator.  
> CF
>
>
>
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