The NGC (Telstra's name for VoIP) calling system Telstra are using is designed to work with the Technicolour modems, and any setup that isn't the use of that standard modem is considered a non-standard setup, so they would only support it via Telstra Platinum (which is more like a IT service rather than a internet tech support.)
If you were trying to get the Uni-V point activated so you could plug the phone in via it, my understanding is that it is usually only setup when it is required for things like medical reasons... but I have seen people here who have both been successful and unsuccessful in getting Uni-V activated so they can use alternative modems...
If you were trying to get the Uni-V point activated so you could plug the phone in via it, my understanding is that it is usually only setup when it is required for things like medical reasons... but I have seen people here who have both been successful and unsuccessful in getting Uni-V activated so they can use alternative modems...