Since some time this morning, all incoming calls that don't get answered within 4 rings get a busy signal instead of being transferred to the Oooma Telo voicemail. If I answer an incoming call within the 4 rings everything is fine, but if I don't the caller eventually gets a busy signal (and hangs up, obviously.) As a result, I am also unable to access voicemail remotely, since the machine never picks up when I call in. This happens whether I call my connected landline - which is currently set to forwarding all calls to my virtual phone number, until the number is ported - or the virtual phone number directly.
I checked to make sure the answering machine in my cordless phone was off (it is.) I can access the voice mail from the Telo or the cordless handset in the house. I also tried changing the number of seconds / rings before voicemail picks up, no difference. If I turn on Do Not Disturb, the phone doesn't ring but callers just hear the busy sign right away, instead of after a number of rings. Basically, it's as if the Telo voicemail has been replaced by a busy signal for my callers.
Any ideas? I already rebooted the Telo, the problem didn't go away.