ICC offers Telco cables for connecting voice and data network equipment together. Insulation Displacing Connectors (IDC) termination is the preferred method for terminating wires for voice or data connectivity; such as 66 blocks and 110 systems. ICC insists on IDC termination for connecting Telco connectors to a 25-pair cable because the connections have excellent performance and high reliability. The terminals have spring properties that hold the wires in a stable mechanical condition. Telco cables are available with 50-pin male and female connectors pre-terminated on each end. They also come with one end non-terminated for punching down on a patch panel or wiring block.