...[T]he TV networks... say they have revamped the way they collect and analyze polling data, using more sophisticated equipment and better communications. To tone down their competitive instincts in "calling" states for either candidate, some are blocking their news desks from watching rivals' shows. All the networks are also striving to get their respective "decision desks" -- the units that make the calls -- to work more closely with the producers and reporters.... CBS News said the computers VNS used weren't sophisticated enough to compare voting data with historical information and were incapable of raising red flags where they were...