NetComm NB1 - Manual (Page 28)

NB1 User Guide YML780 Rev1
28 www.netcomm.com.au
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.
Connect /
Disconnect 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.