VXML call transfer - vxml

Question

I wrote an VXML file where first when user entered the system he listens welcome audio source, then he needs to enter a number for transferring call to the number that he entered. If a user does not enter a number so call must be transferred to operator with number 2212. But this vxml does not transfer any call, where I have made mistake and how can I fix it?
<vxml version="2.0">
<var name="number"/>
<form id="main">
<field name="phone" type="digits?length=4">
<grammar mode="dtmf" type="application/grammar+regex">[0123456789] </grammar>
<prompt bargein="false" timeout ="60">
<audio src="flash:welcome.au"/>
</prompt>
<noinput>
<transfer name="transferToOperator" dest="phone:2212">
</noinput>
<nomatch>
<transfer name="transferToOperator" dest="phone:2212">
</nomatch>
<filled>
<assign name="number" expr="phone"/>
<transfer name="transferToInputNumber" dest="phone:number">
</filled>
</field>
</form>

Answer 1

dest="phone:2212" may be valid for your platform, but the specification says this should be:
dest The URI of the destination (telephone, IP telephony address).
Platforms must support the tel: URL syntax described in [RFC2806] and
may support other URI-based addressing schemes.
So your attribute should be: dest="tel:2212"

Answer 2

You have made use mistake in your application code with wrong use of tag
See the parent - child relationship of vxml application tag here:
http://help.voxeo.com/go/help/xml.vxml.elements.overview
As per your given application code, you can do like this:
<?xml version="1.0" encoding="UTF-8"?>
<vxml version="2.0">
<var name="number"/>
<form id="main">
<field name="phone" type="digits?length=4">
<grammar mode="dtmf" type="application/grammar+regex">[0123456789] </grammar>
<prompt bargein="false" timeout ="60s">
<audio src="flash:welcome.au"/>
</prompt>
<noinput>
<goto nextitem="transferToOperator"/>
</noinput>
<nomatch>
<goto nextitem="transferToOperator"/>
</nomatch>
<filled>
<assign name="number" expr="phone"/>
<goto nextitem="transferToInputNumber"/>
</filled>
</field>
<transfer name="transferToOperator" dest="tel:2212">
<filled>
<disconnect/>
</filled>
</transfer>
<transfer name="transferToInputNumber" dest="tel:number">
<filled>
<disconnect/>
</filled>
</transfer>
</form>
</vxml>