I noticed yesterday that dialing into my number gets the following message:
"All circuits are busy. Please try your call again later. Message 8 Switch 51-3"
I can dial out without a problem, I only get the message when I dial in. Trying to diagnose the issue and was wanting some advice as to where to start.
I doubt this has anything to do with the OBi. It's likely a problem with your service provider.
I had similar issues with my service provider. I signed up for a Google Voice phone number and used to get this error while calling from my cell phone. Changed to another Google Voice number with different three digits after the area code and was able to call without a problem.