Aastra 9133i Dial Plan

I am using Trixbox Pro and have to replace some grandstream phones at a clients office and would like to use Aastra phones. I have an Aastra 9133i for my office phone and use Trixbox Pro as well. The question is:

The Grandstream phones we are using allow us in the account settings to set "Dial Plan Prefix: 9". This enables us to call out without dialing 9 first.

Is there a dial code I can use in the aastra 9133i dial plan that will allow me to prepend a 9 so as to avoid having to dial 9 before each call?

This is my current 9133i Dial Plan:
0|911|2XX|900X|8XXX|*[13]|*[65]X|9[469]11|9[2-9]XXXXXX|*[78][456]XXX|91877[2-9]XXXXXX|91888[2-9]XXXXXX|91800[2-9]XXXXXX|XX+#

An example of what I am looking for is the Polycoms allow you to use the string RR9R1[2-9]xxxxxx to accomplish this