An insulation-displacement connector (IDC), insulation-displacement technology/termination (IDT) or insulation-piercing connector is an electrical connector designed to be connected to the conductor(s) of an insulated wire or cable by a connection process which forces a selectively sharpened blade or blades through the insulation, bypassing the need to strip the wire of insulation before connecting. When properly made, the connector blade cold-welds to the wire, making a highly reliable gas-tight connection.
Modern IDC technology developed after and was influenced by research on wire-wrap and crimp connector technology originally pioneered by Western Electric, Bell Telephone Labs, and others. Although originally designed to connect only solid (single-stranded) conductors, IDC technology was eventually extended to multiple-stranded wire as well.
Such connections are usually seen in low-current applications such as telecoms, networking and signal connections between parts of an electronic or computer system.
Read more about Insulation-displacement Connector: Ribbon Cable, Telephone and Network Plugs, Punchdown Blocks, Common Layouts