Black CSI is an IT solutions provider that focuses on delivering return on investment for clients. They offer VOIP phone solutions from Zultys that provide benefits like cost savings, redundancy if internet goes down, and feature-rich phones with no hidden fees. Black CSI also provides security camera and access control systems that allow for remote video viewing, mobile compatibility, integration of analog and IP cameras, protection from viruses and hackers, and cost-effectiveness as the system grows. They are a one-call partner for IT managed services and solutions.