Zoom X5v settings for Oztralia

Just a long shot but is anyone using the Zoom X5v VoIP, modem router thingie
and also using oztralia as their VoIP provider?

My brother has been trying to set it up to work but totally failed.
Oztralia, when asked, seem to be useless saying 'ask on the forum', from
whence one gets no reply. Also can't find any Australian telcom or VoIP
groups.

Thanks

Mark BR
(replies can be sent to briley at onetel dot com - reply to does not work)