Not sure if anyone else has noticed this, but since last night, I am unable to call any Vermont landline (a.k.a. FAIRPOINT) phone numbers from my Broadvoice line. Message is: "I'm sorry, your call cannot be completed as dialed." The same issue also exists at work, where we also use Broadvoice.
I called Broadvoice tech support, and they said the problem is on Fairpoint's end. They've reported it several times.
On an interesting and semi-related note, I have experienced (twice in the past) a problem where people with Verizon Wireless couldn't dial my Broadvoice line (similar message). I got through to someone at Verizon Wireless, and they were able to confirm and fix the problem. They said the issue was with routing tables (the dialing kind, not the IP kind).
Of course, being a Verizon Wireless customer also, it was a lot easier for me to get them to listen.