Nortel Networks NB5PLUS4/W manual Vpi, Vci, Pcr, Scr, Mbs, Cdvt

PVC (Private Virtual Circuit) Settings

Option	Description
VPI:	(Virtual Path Identifier) If instructed
	to change this, type in the VPI value
	for the initial connection (using PVC 0).
	Default = 0.
VCI:	(Virtual Channel Identifier) If instructed
	to change this, type in the VCI value
	for the initial connection (using PVC 0).
	Default = 0.
	Your modem can support up to 8 PVCs.
	For example, you could have one PVC
	(8/35) for your Internet traffic, and
	another PVC (9/35) for your VoIP traffic.
	Contact your ISP for further details.
QoS:	Default is UBR (Unspecified Bit Rate).
	Change this setting if your ISP instructs
	you to do so. The other settings are CBR
	(Constant Bit Rate) and VBR (Variable
	Bit Rate).
PCR:	Divide the DSL line rate (bps) by 424
	(the size of an ATM cell) to find the Peak
	Cell Rate (PCR). This is the maximum
	rate at which the sender can send cells.
SCR:	The Sustain Cell Rate (SCR) sets the
	average cell rate (long-term) that can
	be transmitted.
MBS:	Maximum Burst Rate. Represents the
	maximum number of cells accepted
	over a period of time. When the cell rate
	exceeds the MBS cells can be dropped.
CDVT:	Cell Delay Variation Tolerance. If your
	PVC is a CBR service you need to set
	the PCR and CDVT parameters. Ask your
	ISP what the best settings are for these
	on their network.
Auto PVC:	If enabled your modem will automatical-
	ly detect your PVC (VPI/VCI) settings.
Connn­ect /
Disconnn­ect Button­s:	Click Connect button to attempt to con-
	nect using the settings you have speci-
	fied. Click Disconnect button to discon-
	nect the current profile.
Apply:	Click Apply to save the changes.

NB5Plus4/W User Guide	YML754Rev1
32	www.netcomm.com.au