| Business | Phone |
| A A Arohnse Locksmith & Intcm 666 W End Ave, New York 10025 | (212) 875-1414 |
| Associated Intercom 1592 3rd Ave, New York 10128 | (212) 794-6418 |
| Cbs Intercom Systems 1592 3rd Ave, New York 10128 | (212) 410-0090 |
| Intex Inc 345 E 92nd St, New York 10128 | (212) 502-0311 |
| Precision Interconnect Corp 161 E 32nd St, New York 10016 | (212) 725-9700 |
| Speakerbus Inc 74 Trinity Pl # 1400, New York 10006 | (212) 964-3844 |
| Lorcom Telecommunications 260 W 16th St, New York 10011 | (718) 829-1234 |
| Pacific Interconnect Inc 396 Broadway, New York 10013 | (212) 925-3245 |
| New York intercom service 332 E 90th st, New York 10128 | (917) 677-6664 |