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38 NB712 / NB714 User Guide
YML829 Rev1
If the WAN protocol is IPoA or EoA, leave the ISP parameters as default setting. The system will ignore the
information but deleting or leaving blank fields will cause a system error.
QoS (Quality of Service): The Traffic Management Specification V4.0 defines ATM
service catalogues that describe both the traffic transmitted
by users onto a network as well as the Quality of Service that
the network needs to provide for that traffic.
UBR (Unspecified Bit Rate): UBR is the simplest service provided by ATM networks. There
is no guarantee of any rate. It is a primary service used for
transferring Internet traffic over the ATM network.
CBR (Constant Bit Rate): CBR is used by connections that require a static amount of
bandwidth that is available during the connection life time.
This bandwidth is characterized by Peak Cell Rate. Based on
the PCR of the CBR traffic, specific cell slots are assigned for
the VC in the schedule table. The ATM always sends a single
cell during the CBR connection’s assigned cell slot.
VBR-rt (Variable Bit Rate real-time): VBR-rt is intended for real-time applications, such as
compressed voice over IP and video conferencing, that
require tightly constrained delays and delay variation. VBR-rt
is characterized by a peak cell rate (PCR), sustained cell rate
(SCR), and maximum burst rate (MBR).
PCR (Peak Cell Rate) in kbps: The maximum rate at which you expect to transmit data,
voice and video. Consider PCR and MBS as a means of
reducing lantency, not increasing bandwidth. The range of
PCR is 64kbps to 2400kbps
SCR (Sustained Cell Rate): The sustained rate at which you expect to transmit data,
voice and video. Consider SCR to be the true bandwidth of a
VC and not the long-term average traffic rate. The range of
SCR is 64kbps to 2400kbps.
MBS (Maximum Burst Size): The amount of time or the duration at which the router
sends at PCR. The range of MBS is 1 cell to 255 cells.
Click Finish to finish setting.
The screen will display the parameters that will be written to EPROM. Check the parameters before writing to
EPROM.
Press Restart to restart the router with the new parameters or press Continue to setup other parameters.