asterisk users - Oct 2006 - getting DID info..

This might be a newbie question...  I'm using a SIP trunk and trying  
to get DID line information on an incoming call.  All I hear is a  
nice lady saying 'Zero' - then the call continues...  Any suggestions?
  thanks
    Todd

exten => s,n,Set(DIDID=(<${FROM_DID}>))
exten => s,n,SayNumber(DIDID)

   or

exten => s,n,Set(FROM_DID=${EXTEN})
exten => s,n,SayNumber(FROM_DID)

   and a third try.. (I'm not sure what 's' is, but saw it
somewhere..)

exten => s,n,Set(FROM_DID=s)
exten => s,n,Wait(1)

Thanks for the help Jerry - I'm getting closer, but still no luck...

Now, I hear the lady say "S".  I think what is happening is that the  
GoTo command is setting the extension to 's' when it transfers  
control to the context defined in the IAX.conf -where I have the  
trunk line defined...

exten => h,1,Hangup
exten => s,n,Answer
exten => s,n,Wait(1)
exten => s,n,SayAlpha(${EXTEN})

It is my impression that the EXTEN variable is used as the internal  
extension - not the incoming DID number, but you seem pretty  
confident so I must be wrong.  What I"m looking to do is a FOP pop-up  
with the DID number and caller ID number in it...   I'll tie that  
into a web-based database...


Here's my full log file..

Oct 20 14:23:42 VERBOSE[5387] logger.c:     -- Accepting  
AUTHENTICATED call from 204.11.194.34:
        > requested format = ulaw,
        > requested prefs = (),
        > actual format = ulaw,
        > host prefs = (ulaw|alaw|gsm),
        > priority = mine
Oct 20 14:23:42 VERBOSE[5862] logger.c:     -- Executing Set 
("IAX2/204.11.194.34:4569-4", "LOOPCOUNT=0") in new stack
Oct 20 14:23:42 VERBOSE[5862] logger.c:     -- Executing Set 
("IAX2/204.11.194.34:4569-4", "__DIR-CONTEXT=default") in
new stack
Oct 20 14:23:42 VERBOSE[5862] logger.c:     -- Executing Answer 
("IAX2/204.11.194.34:4569-4", "") in new stack
Oct 20 14:23:42 VERBOSE[5862] logger.c:     -- Executing Wait 
("IAX2/204.11.194.34:4569-4", "1") in new stack
Oct 20 14:23:43 DEBUG[5387] chan_iax2.c: Ooh, voice format changed to 4
Oct 20 14:23:43 VERBOSE[5862] logger.c:     -- Executing SayAlpha 
("IAX2/204.11.194.34:4569-4", "s") in new stack
Oct 20 14:23:43 DEBUG[5862] channel.c: Scheduling timer at 160 sample  
intervals
Oct 20 14:23:43 VERBOSE[5862] logger.c:     -- Playing 'letters/ 
s' (language 'en')

>
> DID is the inbound call number.
> The <> is notation for CallerID name, that won't help.
>
> s is the "start" extension. setting it to "FROM_DID"
makes no sense.
> (This is the extention that "starts" in this context; it is a  
> default, if
> the context is started without an extension. (eg batphone or called  
> from another
> context))
>
> FROM_DID=${EXTEN} gets you the right number.
> However, "SayNumber" is looking for a SINGLE digit. Your  
> "000-000-0000" style number is overflow, and hence
"zero".
> You have to parse the number to do this right.
>
> If you aren't sure how, let me know, I might have a macro to do it.
>
> Thanks,
> J.
>
>

>
> This might be a newbie question...

You're right, part of it is.  I don't mean to sound rude, but you really
need to go do some research first to get the basics down.  First place is to
read the book, Asterisk: The Future of Telephony (available for free,
there's this site called google.com that can give you loads of information,
including where to download the book), the next stop would be
www.voip-info.org.

By basics, I'm referring to your numbering.  It should be:

exten => s,1,....
exten => s,n,....

Now, to answer your question, which looks to be a good question.  On a PRI,
the variable ${DNID} contains the dialed number (I believe, or at least it
did for me in testing).  On a SIP connection, see:
http://www.voip-info.org/wiki/view/DNID.  It appears you may need to use
something else for a SIP connection.  You'll have to see for yourself.  In
my case, it does not return the number dialed, but rather the SIP username
dialed.

BTW, the FROM_DID variable is something from FreePBX, not standard
Asterisk.  Are you using standard Asterisk, FreePBX, Trixbox, or
Asterisk@Home?
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