The Hall County Board of Commissioners is looking to spend $2.5 million on software upgrades in an effort to finish up a long-anticipated overhaul of the emergency 911 system. The commission is set to vote Thursday on awarding a contract to a San Diego firm, Tritech, to do the work, which would take a year to 14 months to complete. “The software we’re currently using has been in operation for about eight years,” said David Kimbrell, Hall County Emergency Management Agency director.