asterisk users - May 2007 - bridging calls between two numbers with extensions

I am using the Originate Manager API call to bridge a call between two
numbers. The first number is called by originate and the action is set
to Dial the other number.

If the second number has an extension that needs to be sent using DTMF
I can use the D option when I call Dial like this:

Local/913155551212@X||D(ww1ww2ww3ww4)

This works fine. My question is how do I send DTMF to the first number
called? As far as I know there is no way to send DMTF using Originate like
you can with Dial.

Thanks,
Matthew Boedicker