| Business | Phone |
| A N Devices Inc 2933 Bayview Dr, Fremont 94538 | (510) 226-8900 |
| Active Optical Networks Inc 4215 Technology Dr, Fremont 94538 | (510) 440-9199 |
| Dare Technologies 48521 Warm Springs Blvd, Fremont 94539 | (510) 413-0055 |
| Neptec Inc 48501 Milmont Dr, Fremont 94538 | (510) 687-1101 |
| Oplink Communications Inc 46335 Landing Pkwy, Fremont 94538 | (408) 433-0606 |
| Opnext Inc 940 Auburn Ct, Fremont 94538 | (510) 580-8828 |
| Pine Photonics Communications 940 Auburn Ct, Fremont 94538 | (510) 687-9718 |
| Santur Corp 40931 Encyclopedia Cir, Fremont 94538 | (510) 656-7130 |
| Sdo Communicatins Corp 42986 Osgood Rd, Fremont 94539 | (510) 360-1620 |
| Y Y Labs Inc 3945 Avocet Ter, Fremont 94555 | (510) 739-6049 |
| Wave Splitter Inc 46758 Lakeview Blvd, Fremont 94538 | (510) 580-8888 |
| Wavelink Networks Inc 43092 Christy St, Fremont 94538 | (510) 979-9898 |