Update:
 

We have been advised that the motherboard on this AU server has died. Techs are in the process of moving the Hard Drives into another machine.

I too have been unable to call since late this morning (melbourne).
Turning on "Use DNS SRV" allows me to now login
BUT i've not needed this setting for years... Why Now?

The working settings are

Use DNS SRV:yes
DNS SRV Auto Prefix: yes
Proxy Fallback Intvl: 3600
Proxy Redundancy Method:Based on SRV Port

should proxy: (for DNS) be changed mines set to

proxy: au.voxalot.com:5060

don't know why doesn't work as: au.voxalot.com

edit:
for DNS switchced on, ive tried proxy
voxalot.com & voxalot.com:5060
still doesn't work :(

Other settings I have are outlined here as well
HowTo: 6 Steps To Optimize Your Audio - Voxalot FAQ - dont know if you have tried these as well - also SPA proxy is still au.voxalot.com - Bill

Thanks for all your help Bill

anyway AU voxalot server seems to be registering now :)

This setting allows your ATA to fail over to backup servers. Please read: http://forum.voxalot.com/voxalot-sup...lemention.html

Server motherboard has been replaced and server is now operational.

Welcome to OzVoIPStatus | Oz VoIP Status VoIP Monitoring - Martin and crew are you aware of the outages today - Bill
Even though I can dial out it takes up to 20 seconds to access Voxalot Voicemail so all is still not well - Bill

Currently it takes 50 - 120 (hangup @ 120) seconds for the number dialled o start ringing.

What is going on with all of these outages - not really what I expected!

Been on and off since 8:11:36 EST for most of the day..... Current outage has been going for 46min so far.....