| Business | Phone |
| Digital Lightware Inc Reston 20191 | (703) 433-0747 |
| Gray Communications 1861 Wiehle Ave, Reston 20190 | (703) 471-2884 |
| High-Tech Telecom 2100 Reston Pkwy, Reston 20191 | (703) 323-1144 |
| Siemens Business Comm Systems 1881 Campus Commons Dr 500, Reston 20191 | (703) 262-2000 |