| Business | Phone |
| Comlink Switching 1565 N Central Expy, Richardson 75080 | (972) 644-4488 |
| Bueno Integrated Technologies 709 Lingco Dr, Richardson 75081 | (972) 235-9190 |
| Buz Net Communications 301 S Sherman St, Richardson 75081 | (972) 644-0440 |
| Radian Communication Svc Es 1198 Commerce Dr, Richardson 75081 | (972) 669-5160 |