hallo richard!
I registred today to poivy (as "test account" - you have 100 minute free calls to free destinations) and all is working well:
1) using sip.voipbuster.com and also
2) using sip.poivy.com
Here is the "Call Record":
07-09 13:26:06 13:26:14 0043720xxxxx 00:00:08
I am using siemens gigaset voip phone and voxalot server eu.voxalot.com.
download speed 16 mbit/ upload 1mbit.
location vienna, austria.
If all other is working well than you have "only" 2 possibilities to make some error:
1) username/password and
2) dial plan regex
...and (please do not laugh) try to reboot your modem, router, ata, sip telephone ........ and do not forget -this is betamax!
)
regards,
fla