I want it to be defined in ABNF-XML (SRGS-XML) so my application is as platform independent as possible. I used the SRGS spec as a reference: http://www.w3.org/TR/speech-grammar/
The digits built-in grammar doesn't work for me since I need to support phone extensions (asterisk). Since PlumVoice does not support the phone or telephone built-in grammar, I have to create one myself that supports phone extensions. This is what I've been able to come up with, but the asterisk still isn't recogized:
The reason your vxml is not working is due to the way you are declaring your <item> tags. I have taken the liberty of fixing your IVR code and testing it. Try this: