asterisk users - Feb 2007 - Passing a variable from one Asterisk box to another

Hi all,

We currently have 2 Asterisk boxes and we pass calls to a fro. All works
great except we now need to pass variables between them.

For example now on box 1 we have:

exten => _23XX,1,SetVar(Foo=1234)
exten => _23XX,2,Dial(SIP/${EXTEN:0}@Box2)

When the call dials into Box 2 the variable Foo does not get passed...

Does anyone have any clever ideas?
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Eric Bishop wrote:
> Hi all,
>
> We currently have 2 Asterisk boxes and we pass calls to a fro. All works
> great except we now need to pass variables between them.
>
> For example now on box 1 we have:
>
> exten => _23XX,1,SetVar(Foo=1234)
> exten => _23XX,2,Dial(SIP/${EXTEN:0}@Box2)
>
> When the call dials into Box 2 the variable Foo does not get passed...
>
> Does anyone have any clever ideas?
as noted in asterisk/docs/README.variables (iirc)

you should see that variable inheritance can occur by prefacing the 
variable with '_' or '__'

also, depending on the age of your asterisk you might want to start 
using 'Set' vice 'SetVar'

also, having ${EXTEN:0} , the :0 doesn't do anything, so you should not 
use it and just have ${EXTEN}

i hope this helps

________________________________

From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Eric
Bishop
Sent: Tuesday, February 20, 2007 5:11 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: [asterisk-users] Passing a variable from one Asterisk box to
another



	Hi all,
	
	We currently have 2 Asterisk boxes and we pass calls to a fro.
All works great except we now need to pass variables between them. 
	
	For example now on box 1 we have:
	
	exten => _23XX,1,SetVar(Foo=1234) 
	exten => _23XX,2,Dial(SIP/${EXTEN:0}@Box2)
	
	When the call dials into Box 2 the variable Foo does not get
passed...
	
	Does anyone have any clever ideas? 
	  

The correct way using SIP is to add X headers before the Dial and then
pulling them in and assigning them to channel variables on the ingress
box.  Here's a snippet that shows the idea:

On the box dialing out:

exten => _23XX,1,Set(Foo=1234)  <--- Use Set here not SetVar
exten => _23XX,2,SIPAddHeader(X-Foo: ${FOO})
exten => _23XX,3,Dial(SIP/${EXTEN:0}@Box2)


On the ingress box:

exten => _23XX,1,Set(Foo=${SIP_HEADER(X-Foo)})
exten => _23XX,2,Answer()
...yada yada


Regards,
- Brad


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Use SIP headers... you could also use the SIP headers to store a ID/key for
lookups against a database (e.g., store your call associated data in the
database, for use by multiple machines).

Justin Newman




 
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You could also use Set(CALLERID(name)=1234*${CALLERID(name)})
and then on the other astereisk server use app_cut to reformat CID and
extract the Var.


On 2/20/07, Eric Bishop <asterisk.eric@gmail.com>
wrote:
> Hi all,
>
> We currently have 2 Asterisk boxes and we pass calls to a fro. All works
> great except we now need to pass variables between them.
>
> For example now on box 1 we have:
>
> exten => _23XX,1,SetVar(Foo=1234)
> exten => _23XX,2,Dial(SIP/${EXTEN:0}@Box2)
>
> When the call dials into Box 2 the variable Foo does not get passed...
>
> Does anyone have any clever ideas?
>
>
>
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