We are going through the very same thing right now, you have to have the software to run the ivr. One of the ones that Nortel recomends is a peri program. You can buy the software toolkit and the keycodes to let you program your own but I belive that they are like $10,000. Then yo have to be able to write computer programs. I searched and searched trying to prove myself wrong, but it does not look like I am. If you contact Nortel they can put you in touch with the right people for the program.
Wish I had better news for you, Good Luck