| Business | Phone |
| Alpha Business Communications 1123 Broadway # 1114, New York 10010 | (212) 807-8550 |
| Empire Data & Voice Corp 1826 2nd Ave, New York 10128 | (212) 410-5353 |
| Information & Communication 1120 Avenue Of The Americas 7, New York 10036 | (212) 450-7447 |
| Polygon Data & Voice Sys Corp 40 Elizabeth St # 400, New York 10013 | (212) 625-2698 |
| Precision Interconnect 1 Penn Plz, New York 10119 | (212) 564-1119 |
| Tandberg Inc 200 Park Ave, New York 10166 | (212) 692-6500 |
| Tectel Connections 153 W 27th St, New York 10001 | (212) 255-2009 |
| Tele-Transition Organization 219 E 84th St # 4h, New York 10028 | (212) 772-7780 |