* VoIP SIP domain: iinetphone.iinet.net.au
* SIP server: sip.state.iinet.net.au (where state is your location, e.g. NSW)
* Username: Your VoIP phone number (remove formatting such as spaces and brackets)
* Password: Your VoIP password
* Reregistration time interval: 300 seconds
* Codec preference:: G.729, then G.711 (u-Law and/or a-Law)
* DNS: : Use SRV records
* Phone number: Your VoIP number
* Display name: iinetphone
* SIP domain: iinetphone.iinet.net.au
* SIP server: sip.state.iinet.net.au (where state is your location, e.g. VIC)
* Proxy IP: sip.state.iinet.net.au (where state is your location, e.g. WA)
* Registrar IP: sip.state.iinet.net.au (where state is your location, e.g. QLD)
* ACT: sip.act.iinet.net.au
* NSW: sip.nsw.iinet.net.au
* NT: sip.nt.iinet.net.au
* QLD: sip.qld.iinet.net.au
* SA: sip.sa.iinet.net.au
* TAS: sip.tas.iinet.net.au
* VIC: sip.vic.iinet.net.au
* WA: sip.wa.iinet.net.au
I assume you have properly configured your firewall..
Have you setup an outgoing proxy or a dial plan?