| Business | Phone |
| Black Box Network Svc 1391 Wheaton Dr 200, Troy 48083 | (248) 743-1320 |
| Escort Memory Systems 1711 Larchwood Dr # A, Troy 48083 | (248) 457-9797 |
| Executone Telecommunications 1878 Austin Dr, Troy 48083 | (248) 649-9100 |
| Escort Memory Systems 1397 Piedmont Dr # 600, Troy 48083 | (248) 457-9797 |