ZyXEL Communications Prestige 861H-G1, User Manual

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Prestige 861H User’s Guide
7-8 WAN Setup
Table 7-2 WAN Setup
LABEL DESCRIPTION
Encapsulation Select the method of encapsulation used by your ISP from the drop-down list box.
Choices vary depending on the mode you select in the
Mode field.
If you select Bridge in the Mode field, select either PPPoA or RFC 1483 .
If you select Routing in the Mode field, select PPPoA , RFC 1483 , ENET ENCAP or
PPPoE .
Multiplex This displays the method of multiplexing used by your ISP.
Virtual Circuit ID VPI (Virtual Path Identifier) and VCI (Virtual Channel Identifier) define a virtual circuit.
Refer to the appendix for more information.
VPI The valid range for the VPI is 0 to 255. Enter the VPI assigned to you.
VCI The valid range for the VCI is 32 to 65535 (0 to 31 is reserved for local management of
ATM traffic). Enter the VCI assigned to you.
ATM QoS Type Select CBR (Contstant Bit Rate) to specify fixed (always-on) bandwidth for voice or data
traffic.
Select UBR (Unspecified Bit Rate) for applications that are non-time sensitive, such as e-
mail.
Select VBR-RT (Real Time Variable Bit Rate) or VBR-nRT (non Real Time Variable Bit
Rate) for bursty traffic and bandwidth sharing with other applications.
Cell Rate Cell rate configuration often helps eliminate traffic congestion that slows transmission of
real time data such as audio and video connections.
Peak Cell Rate 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. Type the PCR here.
Cell Delly Variation
Tolerance This field displays the accepted tolerance of the difference between a cell’s transfer delay
and the expected transfer delay.
Sustain Cell Rate The Sustain Cell Rate (SCR) sets the average cell rate (long-term) that can be
transmitted. Type the SCR, which must be less than the PCR. Note that system default is
0 cells/sec.
Maximum Burst Size Maximum Burst Size (MBS) refers to the maximum number of cells that can be sent at
the peak rate. Type the MBS, which is less than 100.