Surely I'm not the only user on Exetel trying to use one???

ADSL worked fine outta the box, but not VOIP. Still doesn't and I'm outta alternatives.
I DO have what I believe is a voip tone (continuous) and any attempt to dial a number results in a engaged type tone.
I have tried dialling with my registered 02 number prefix and without.
I've even put in a # in desperation.
Hopefully somewhere out there is a 7301 user who succeeded...... somewhere???