| Business | Phone |
| A-1 Communication Systems 281 N Hayden Bay Dr, Portland 97217 | (503) 247-3997 |
| Tssi 5528 Ne 105th Ave # 1, Portland 97220 | (503) 777-4404 |
| Superior Tel 17 Sw Gibbs St, Portland 97239 | (503) 242-1543 |
| Boss Communications Portland 97219 | (503) 245-3669 |
| Christenson Electric Inc 6235 N Basin Ave, Portland 97217 | (503) 285-1970 |
| Communications Test Design 12330 Ne Marx St, Portland 97230 | (503) 253-5959 |
| Communications Test Design Inc 12239 Ne Marx St, Portland 97230 | (503) 257-3330 |
| Complete Communications 8700 Sw 26th Ave, Portland 97219 | (503) 246-9399 |
| Keel Communications Inc Portland 97217 | (503) 283-2120 |
| L J Mattison Communications 7021 Se 31st Ave, Portland 97202 | (503) 771-5708 |
| Realcom Office Communications 10260 Sw Greenburg Rd # 560, Portland 97223 | (503) 293-6480 |