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Chapter 4: Configuring the WAN
MM701G and MM702G User Manual 33
Virtual Channel ID (VCI)
Enter the value (from 32 to 65,535) provided by the service provider. The number
identifies the virtual channel for this session that transports ATM cells between the
modem and the service provider. This value must match the virtual channel
identification (VCI) value the service provider uses for this connection.
ATM QoS
Select the ATM Quality of Service indicated by your service provider. The options are:
• UBR (unspecified bit rate is the default setting)
• CBR (constant bit rate)
• VBR-rt (variable bit rate real-time)
• VBR-nrt (variable bit rate non-real-time)
QoS Peak Cell Rate
Enter the QoS Peak Cell Rate (PCR) value supplied by your service provider. If you
are not provided a PCR value, use the default. PCR is the maximum rate at which data
is transferred on the line and measured in ATM cells per second. The valid range is
1-5500 cells per second. The default PCR is 5500.
QoS Sustainable Cell Rate
Enter the QoS Sustainable Cell Rate (SCR) value supplied by your service provider.
Use for VBR-rt, and VBR-nrt ATM QoS. SCR is the average rate at which ATM cells
are transferred, measured in cells per second. The SCR must be less than the PCR. The
valid range is 1-5500 cells per second.
QoS Maximum Burst Size
Enter the QoS Maximum Burst Size (MBS) value supplied by your service provider.
Use with VBR-rt and VBR-nrt QoS. MBS is the maximum number of cells that can be
transmitted at the peak cell rate. The MBS rate must be equal to or less than the PCR.
The default MBS is 0.