| Business | Phone |
| Marconi Communications Corp 1375 Rte Trans-Canada, Dorval H9P 2W8 | (514) 685-1737 |
| Scientific Microwave Inc 707 Av Lajoie, Dorval H9P 1G7 | (514) 828-9212 |
| Starquest Telecommunications 2020 Boul St-Regis #200, Dorval H9P 1H6 | (514) 421-3234 |
| Desitron Communications Inc 149 Av Guthrie, Dorval H9P 2P1 | (514) 631-2435 |