I have a sneaking suspicion the intermittent Obitalk outages, server issues and the like over the last three months have been related to the integration of the Obihai preferred providers. I detect a pattern and the latest outages are probably related to the upcoming
Ring.to integration. Keep in mind as each new ITSP comes on board, Obihai's connection to their system and API's have to be fine tuned and troubleshooted as required. Ring.to seems to differ from other ITSP's so it might require a little more work on Obihai's part for integration.
Hopefully things settle down after
Ring.to is added to the portal in a little while. That's my take on it at least.