Anyway, I've found that I cannot make outgoing calls to my same exchange, but can make them to any other exchange. I'm in area code 218, in a community with the 935-xxxx exchange. My magicJack number is also in area code 218, but with a 789-xxxx exchange. I've had no problems dialing out to any 218 numbers *except* for those beginning with 935-xxxx, i.e., any within the same town here. On those I get fast busy/reorder tones. So far as I can tell, any number are fine for me to call as long as they don't begin with 935-xxxx. I can, however, have Google Voice make the call and ring my magicJack number where I can then pick it up and successfully make the call, but it seems silly to have to have that extra step in there.
Could something in my Google Voice settings, perhaps, be affecting things? My mind is boggled. Be gentle.