It has since come out that Austin Barbour could have muted the caller at any time, but decided to hang up on everyone instead.
Hat-tip Black Agnes
http://pjmedia.com/blog/hmm-cochran-camp-had-ability-to-mute-audience-during-hijacked-call/?utm_medium=twitter&utm_source=twitterfeed
Seems ole Barbour is trying to use the race card again.