Edimax Technology AR-7266WNA, AR-7266WNB manual UBR Unspecified Bit Rate Select UBR for

Parameter	Description
VPI	VPI is a virtual path determines the way an ATM cell
	should be routed. The VPI is an 8-bit (in UNI) or 12-bit (in
	NNI) number that is included in the header of an ATM
	cell. The valid range for the VPI is 0 to 255. Enter the VPI
	assigned by the ISP.
VCI	VCI is the label given to an ATM VC to identify it and
	determine its destination. The VCI is a 16-bit number that
	is included in the header of an ATM cell. The valid range
	for the VCI is 32 to 65535. Enter the VCI assigned by the
	ISP.
QoS	UBR (Unspecified Bit Rate) – Select UBR for
	applications that are non-time sensitive, such as e-mail.
	CBR (Constant Bit Rate) – This class is used for
	emulating circuit switching. The cell rate is constant with
	time. Select CBR to specify fixed (always on) bandwidth
	for voice or data traffic.
	nrtVBR (non-real time Variable Bit Rate) – This class
	allows users to send traffic at a rate that varies with time
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