I read through this post, and am still having some problems getting this to work. I am using a Mitel 3300 with a Rightfax server. Last Friday our Rightfax server went down. We had our phone vendor forward all of our Fax DID's to a regular fax machine.
We got the fax server up and running again, but when we switched it back to send to the fax server it is not sending the routing code (DID that was dialed) or the Caller ID. Our Rightfax routes the faxes based on the routing code.
I am not sure if something is misconfigured on the Mitel or the Rightfax server, but we followed the instructions in the above posts, actually that is pretty much how we had it setup.
I know the DTMF feature works on the Right fax server because if I call one of the ports and type in an extension 1234, it shows it on the routing group column.
Any assistance would be greatly appreciated.