asterisk users - Jun 2008 - Asterisk : using setvar with IP Realtime and variable inheritance

Hi,

 

I have what I think is a relatively advanced question.  Any help is
appreciated, even if it's not a complete answer.

 

I am using Asterisk in mostly realtime fashion, specifically SIP
registrations are in a MySQL table.  This works fine (mostly).  I also set a
few variables in the setvar column, like this:

 

callerid_internal=test <710>;did=5555551234

 

Again, this works fine. The problem is when I forward my calls to another
outside line (using Polyocm phones), and need to know the ${did} value at
that point.  It's empty.

 

In summary:

Call comes in to extension 710 (let's say)

This extension is forwarded to 5555557890

In my dial plan, when dialing 5555557890 I need to know the value of ${did},
but it's empty.

 

If I hardcode this value in my dialplan using two underscores before it (i.e
Setvar(__did=5555551234) ) this works.  But I can't hardcode it, I need to
fetch it from the table.

 

And yes, I did try to append underscores before the word "did" in my
table,
but that didn't help.

 

ANY help is greatly appreciated, I am completely stuck.

 

Regards,

 

Mick

 

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On Monday 09 June 2008 20:01:53 Mike wrote:
> I have what I think is a relatively advanced question.  Any help is
> appreciated, even if it's not a complete answer.
>
> I am using Asterisk in mostly realtime fashion, specifically SIP
> registrations are in a MySQL table.  This works fine (mostly).  I also set
> a few variables in the setvar column, like this:
>
> callerid_internal=test <710>;did=5555551234
>
> Again, this works fine. The problem is when I forward my calls to another
> outside line (using Polyocm phones), and need to know the ${did} value at
> that point.  It's empty.
Right, so the call path is:

Provider -- Asterisk -- Polycom -- Asterisk--Provider

The problem is that Polycom is in the call path.  It doesn't know anything
about Asterisk variables and so it doesn't pass them on.  What you can do,
however, is do the forwarding not within the phone, but within Asterisk
itself, something like:

exten => _*71NXX-NXX-XXXX,1,Set(DB(forward/myexten)=${EXTEN:3})
exten => *70,1,NoOp(${DB_DELETE(forward/myexten)})

and then in your dialplan:

exten => 101,1,GotoIf($["${DB(forward/myexten)}" !=
""]?forward)
exten => 101,n,Dial(SIP/mypolycom)
exten => 101,n,Voicemail(101,u)
exten => 101,n,Hangup
exten => 101,n(forward),Goto(outgoing,${DB(forward/myexten)},1)

or something like that.

-- 
Tilghman

> callerid_internal=test <710>;did=5555551234
> Again, this works fine. The problem is when I forward my calls to another
> outside line (using Polyocm phones), and need to know the ${did} value at
> that point.  It's empty.
The other answer looks pretty good. If that doesn't work, do a sip
debug on your console, and see if the values you want are in the
traffic at all. You can set up some more complicated rules to parse
your SIP headers if the values are just in a different field.

Mike wrote:
> If I hardcode this value in my dialplan using two underscores before it
(i.e
> Setvar(__did=5555551234) ) this works.  But I can't hardcode it, I need
to
> fetch it from the table.
Have you tried:

Set(__did=${did})

That might work.

-- 
Leif Madsen
http://www.leifmadsen.com
http://www.oreilly.com/catalog/asterisk