SMC Networks SMC7404BRA EU manual 4-21, Parameter, Description

			WAN
	Parameter	Description
VPI/VCI		Virtual Path Identifier (VPI) and Virtual Circuit
		Identifier (VCI.)
		Data flows are broken up into fixed length cells,
		each of which contains a Virtual Path Identifier
		(VPI) that identifies the path between two nodes,
		and a Virtual Circuit Identifier (VCI) that
		identifies the data channel within that virtual path.
		Each virtual circuit maintains a constant flow of
		cells between the two end points. When there is
		no data to transmit, empty cells are sent. When
		data needs to be transmitted, it is immediately
		inserted into the cell flows.
Encapsulation		Specifies how to handle multiple protocols at the
		ATM transport layer.
		•	VC-MUX. Point to Point Protocol over
			ATM Virtual Circuit Multiplexer (null
			encapsulation) allows only one protocol
			running per virtual circuit with less
			overhead.
		•	LLC. Point to Point Protocol over ATM
			Logical Link Control allows multiple
			protocols running over one virtual circuit
			(uses slightly more overhead.)
Idle Time (Minute)		Enter the maximum idle time for the Internet
		connection. After this time has been exceeded the
		connection will be terminated.
ISP Name		Choose the ISP to whom this connection will
		apply.

4-21