| Business | Phone |
| Ipc Information Systems 120 Adelaide St W #2118, Toronto M5H 1T1 | (416) 364-8666 |
| Link Telecom Svc Ltd 289 Beresford Ave, Toronto M6S 3B4 | (416) 763-3999 |
| Local Telephone Co 34 Southport St #200, Toronto M6S 3N3 | (416) 767-7778 |
| Modular Telephone Interface 80 Fraser Ave, Toronto M6K 3E1 | (416) 538-8811 |
| Paytel Canada Inc 6 Adelaide St E #500, Toronto M5C 1H6 | (416) 504-7400 |
| Dong Li Canada Development Co 310 Spadina Ave, Toronto M5T 2E8 | (416) 593-8800 |
| Telcorps 70 Esna Park Dr, Toronto | (416) 324-2909 |
| Wtt Communications Ltd 25 High Park Blvd, Toronto M6R 1M6 | (416) 536-9252 |
| Cellular Systems 25 Davenport Rd, Toronto M5R 1H2 | (416) 923-9300 |
| Wireworks Voice & Data Communications Inc. 736A The Queensway PO Box 57106, Toronto M8Y 3Y2 | (416) 252-1511 |