" A busy test number is 408-269-1999."
I include this last sentence from Stewart's post .
I actually had a lot of problems with 800 numbers, disconnected number, busy numbers etc. but I never connected the dots. I considered those problems a part of general GV unreliability and whenever I had a problem with a number I simply used one of my other providers.
I do think that this is a serious flaw- less serious only if you know that it exists and why which applies to about 0.01% of GV users.
Google should fix it because they are losing revenue on this- toll free numbers are a cash cow. Other than that they off course could not care less , but it would be nice if they let the general public know.