On Wed, Oct 21, 2009 at 3:51 PM, Mark Campbell-Smith <
mcampbellsm...@gmail.com> wrote:
> Thanks Guys for your suggestions! Very much appreciated.
>
> The reason I asked was that I want to check if a variable is set or
> not. I don't think your suggestions will work because I actually have
> to check to see an undefined variable. Any way to do this?
>
Not in the dialplan itself. Better off using a script for this.
>
> I want to have the same extension for checking digits read from DTMF.
> The problem is that the digits are not set to the variable until the
> transfer statement, which means I would require 2 extensions. It
> will make things simpler if I can have the same extension that reads
> the digits and then checks them.
>
You need either to use multiple extensions or use a script. The dialplan was
specifically designed not to be a programming language and the functionality
you seek is best served by using a script or by using transfer to drop the
call through the diaplan again and use another extension.
-MC
>
> For example:
>
> <extension name="checkdigits">
> <condition field="destination_number" expression="^checkdigits$"/>
> <!--The next condition should be true if the variable $digits
> is not set/undefined -->
> <condition field="${digits}" expression="^[^.+]$" />
> -----<<<< what should be here to check for undefined variable $digits
> ?
> <action application="read" data="1 10 ivr/ivr-hello.wav
> digits 10000 #"/>
> <action application="phrase" data="spell,${digits}"/>
> <action application="transfer" data="checkdigits digits XML
> features"/>
> </condition>
>
> <condition field="${pincode}" expression="^${some_variable}$">
> < SOME ACTIONS HERE >
> </condition>
> </extension>
>
>
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