Charlie Norwood VA Medical Center will undergo upgrades on its telephone systems Friday starting at 5:30 p.m. and lasting about an hour, according to a news release. The published phone number (706) 733-0188 -- for the medical center will not be available until the upgrades are complete. The hospital operator and Veteran patient rooms will not be accessible during this upgrade. An alternate phone number – (706) 941-2576 -- will be in use during this short outage for emergent calls, the news release said.