ITC DeltaCom Inc. is among the largest telecommunications firms in the Southern United States. The company s 14-state synchronous optical network and fully integrated telecommunications systems provide voice, data, Internet, storage and security solutions in bundled offerings. Its customers consist of a wide variety of enterprises, small businesses and consumers. ITC DeltaCom operates several subsidiaries, including Interstate FiberNet, a dominant carrier in the South, as well as GrapeVine, a business that offers residential telephone services throughout Alabama, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina and Tennessee. ITC DeltaCom maintains approximately 40 offices throughout the Southeastern U.S., such as an office in Raleigh, N.C.