| Business | Phone |
| Buie Telecommunications Inc 1277 Renee Dr, Decatur 30035 | (404) 288-1520 |
| Electronic Communication Syst 2500 Park Central Blvd, Decatur 30035 | (770) 987-5469 |
| Vodaci Technologies 11111 Aurora Ave, Decatur 30032 | (404) 534-2005 |
| Sun Technology 177 Pine Tree Cir, Decatur 30032 | (404) 499-8533 |