| Business | Phone |
| Advanced Communication Seattle 98106 | (206) 622-7066 |
| Applied Telecom Systems 540 Industry Dr, Seattle 98188 | (206) 575-1546 |
| Computel 6820 Perimeter Rd S, Seattle 98108 | (206) 762-0899 |
| Evergreen Technologies Seattle 98101 | (206) 340-1955 |
| Inside Connection & Cabling Po Box 46279, Seattle 98146 | (206) 244-3771 |