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VCI
Last modified: Monday, September 13, 2004 

Short for virtual channel identifier, a 16-bit field in an ATM cell’s header that identifies the cell’s next destination as it travels through an ATM network (similar to Frame Relay’s DLCI). A virtual channel is a logical connection between two end devices on an ATM network.

Also see VPI. An ATM switch uses either the VPI, the VCI or a combination of both to route the cell.

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