| Business | Phone |
| Alink Systems 12 Glorieta W, Irvine 92620 | (714) 669-0727 |
| Cooper Microelectronics Inc 1671 Reynolds Ave, Irvine 92614 | (949) 553-8352 |
| Custom Silicon Solutions 17951 Sky Park Cir, Irvine 92614 | (949) 797-9220 |
| Engserv 17785 Sky Park Cir # J, Irvine 92614 | (949) 955-3605 |
| Professional Tel Technologies 17822 Von Karman Ave, Irvine 92614 | (949) 622-1800 |
| Susco Electronics Inc 17845 Sky Park Cir, Irvine 92614 | (949) 250-7887 |
| U S Calibration 17922 Sky Park Cir, Irvine 92614 | (949) 724-9474 |