We recently got ooma, and signed up with the premier service. So far, I love the service - can't wait 'till our home number is ported so I can cancel the land line!
Anyway, I've noticed something strange, when calling cell phones, and nobody answers. Instead of their voicemail picking up, and prompting to leave a message, I get a voice asking for a PIN number... I can call the same number, on my land line, and voicemail picks up like normal, and I'm able to leave a message.
This has happened, so far, with at least three different cell numbers, so I'm assuming it will behave the same way with any cell number we call. Regular land line numbers have been working perfectly, so far.
When someone is available to answer the call - it works just fine, it only does this when nobody answers, and the call goes to voicemail (or rather, supposed to go to voicemail)
http://forums.ooma.com/viewtopic.php?f= ... cemail+pin
Disabling the connection tone was one of the first things I did. But I can see how you would want it if you had a landline integrated with ooma.