| Business | Phone |
| Kovno Communications 2600 10th St, Berkeley 94710 | (510) 849-3225 |
| Nlayer Communications Inc 741 Gilman St, Berkeley 94710 | (510) 558-3139 |
| Telemedia Communication Syst 29 Fairlawn Dr, Berkeley 94708 | (415) 397-6221 |
| Whitaker Communications 1731 Carleton St, Berkeley 94703 | (510) 847-0599 |