Well thanks, that's much more specific and helpful.  It's an intermittent issue that's usually resolved by restarting the phone.  I only notice it happening at home, not when I am at work, but I don't call out as much at work either.  So it's hard to do a foolproof test using wifi only.  I have Verizon Fios internet so I hope it would meet the qualifications, but I will try a VoIP test and see what I find.