| Business | Phone |
| Automation Power Svc 12 Scott Rd, Cambridge N3C 2X4 | (519) 658-4153 |
| Intelecom Systems & Data 74 Queen St E #100, Cambridge N3C 2B1 | (519) 654-2003 |
| M C Communication Systems 298 Sekura St, Cambridge N1R 7V8 | (519) 622-9143 |
| Rodin Networks 221 Holiday Inn Dr, Cambridge N3C 3T2 | (519) 249-0155 |