| Business | Phone |
| Amphenol Fiber Optic Products 1778 N Plano Rd, Richardson 75081 | (972) 744-9801 |
| Chorum Technologies Inc 1301 E Arapaho Rd, Richardson 75081 | (214) 570-3500 |
| Optical Communication Products 101 W Buckingham Rd 161, Richardson 75081 | (972) 643-1812 |