I'm was having a similar problem with my 200. I couldn't setup sp1 to
VOIP.MS but I could set it up to Anveo. In the OBiTALK portal under Service Provider Set-Up status I got the message "Service not configured". I could however set up sp2 - sp4 to
VOIP.MS. I did a hard reset as well and also downgraded the firmware to whatever was available at this link:
http://fw.obihai.com/OBi2-latest.fw . In addition I Reset the OBi Expert Config. It turns out the proxy server setting was not being sent to my ATA. For some reason the check box under "OBiTALK settings" on the proxy server line was staying checked.
I'm having poor audio quality with Anveo (constant stuttering) and I'm having an issue with the Anveo proxy server not changing. It registers but it does not change to anything other than their Dallas server. I've gone so far as to change the server manually in the OBi Expert config and it still doesn't change on the ATA. So you might want to make sure your settings are being applied to your ATA.