said by N3OGH :

Tried to call a friend I know has Sunrocket, and I got the dreaded "fast busy".
But, I can't remember the last time I picked up my POTS phone and didn't hear a dial tone.

We’ve finally figured out what happened to the dial tones on our phones in the newsroom – they’ve flown the coop along with the rest of the SunRocket VoIP phone service.

But on Monday afternoon, odd things began happening with our phones – unable to dial out but could get incoming calls.

Calls and e-mails to the company failed to provide any answers.