| Business | Phone |
| Andrew Corp 1725 Washington Rd, Pittsburgh 15241 | (412) 851-9120 |
| Engineered Communications Inc 1610 Potomac Ave, Pittsburgh 15216 | (412) 344-9000 |
| Mobile Radio Svc Inc 5335 Butler St, Pittsburgh 15201 | (412) 781-8882 |
| Staley Communications Inc 3229 Spruce Way, Pittsburgh 15201 | (412) 392-0220 |