| Business | Phone |
| Alarms By Reliable Detection 919 State St # B, New Haven 6511 | (203) 772-0075 |
| Alert Security Sys 308 Blake St, New Haven 6515 | (203) 387-8332 |
| South Central Security Systems New Haven 6519 | (203) 234-9327 |
| Connecticut Security Alarms New Haven 6511 | (203) 777-0271 |
| Continental Security Svc Inc 16 Allen Pl, New Haven 6512 | (203) 468-9384 |
| Culhane Protective Systems 184 Fountain St, New Haven 6515 | (203) 387-1647 |
| Rasheed Security Alarms Co 22 Arthur St, New Haven 6519 | (203) 562-5218 |