A bit more information.
Have now tried xlite-3 softphone installation as well, calling my friend passes the call to the voicemail box.
I replaced domain 'names' with IP addresses and that makes it clear that my telephone number is registered with voxalot.com and not the proxy au.voxalot.com.
I have used a standalone NetComm v85 IP phone which registers if I use IP numbers for domains [not sure why, as it only seems to be voxalot registration this is required] when registered I can call my friend as intended.
When watching the WireShark packet analyser I now notice that both our numbers show up nicely in the format xxxxxx@64.35.163.35. When making a call they just won't 'meet' at the same time? Something to do with timezones
