Vci

VCI is an acronym used in several domains. In automotive contexts, it commonly stands for Vehicle Communication Interface, the hardware and software that connects a vehicle's onboard computer to diagnostic tools. In networking, VCI denotes Virtual Channel Identifier in Asynchronous Transfer Mode networks. In materials protection, Vapor Phase Corrosion Inhibitors are sold under the VCI label.

A Vehicle Communication Interface (VCI) is the interface between a vehicle's OBD system and a diagnostic tool. It typically uses standards such as OBD-II, CAN, ISO 9141, K-Line, and J1962. A VCI dongle or cable connects to the vehicle's diagnostic port and to a laptop or mobile device running software. It enables fault code reading, live sensor data monitoring, ECU programming, and system testing. It is widely used by mechanics and in shops.

In ATM networks, the Virtual Channel Identifier (VCI) is used with the Virtual Path Identifier (VPI) to designate a specific virtual circuit through an ATM switch. A VPI/VCI pair routes cells across the network. Typical values support VPI 0–255 and VCI 0–65535, though actual ranges depend on the equipment and configuration. VCIs are less visible in consumer networks today but remain part of legacy or specialized ATM deployments.

Vapor Phase Corrosion Inhibitors (VCI) are chemicals that volatilize inside sealed packaging to form a protective atmosphere on metal surfaces. VCI papers, films, and emitters are used to protect steel, iron, copper, and other metals during storage and transport. They reduce corrosion without requiring oily or greasy coatings, but proper material compatibility and disposal considerations apply.