ZyXEL Communications P-663H-51, User Manual

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Chapter 5 WAN Setup
P-663H-51 User’s Guide
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The realtime VBR type is used with bursty connections that require closely controlled delay
and delay variation. It also provides a fixed amount of bandwidth (a PCR is specified) but is
only available when data is being sent. An example of an realtime VBR connection would be
video conferencing. Video conferencing requires real-time data transfers and the bandwidth
requirement varies in proportion to the video image's changing dynamics.
The non realtime VBR type is used with bursty connections that do not require closely
controlled delay and delay variation. It is commonly used for "bursty" traffic typical on LANs.
PCR and MBS define the burst levels, SCR defines the minimum level. An example of an non
realtime VBR connection would be non-time sensitive data file transfers.
5.2.1.3 Unspecified Bit Rate (UBR)
The Unspecified Bit Rate (UBR) ATM traffic class is for bursty data transfers. However, UBR
doesn't guarantee any bandwidth and only delivers traffic when the network has spare
bandwidth. An example application is background file transfer.
5.3 WAN
Click Advanced Setup > WAN to open the following screen. This screen displays your
ZyXEL Device’s WAN Internet access settings. You can also edit those settings and add more
settings. The screen differs by the encapsulation.
See Section 5.1 on page 51 for more information.
Figure 22 Advanced Setup > WAN
The following table describes the labels in this screen.
Table 11 Advanced Setup > WAN
LABEL DESCRIPTION
Port/VPI/VCI This field displays the WAN connection’s DSL port, Virtual Path Identifier, and
Virtual Channel Identifier. The DSL port is always 0 because the DSL ports are
bonded into a single logical port.
VLAN Mux. This field shows whether or not VLAN multiplexing is enabled. VLAN
multiplexing allows multiple separate WAN connections within the same PVC.
Con. ID This is the number of the WAN connection.
Category This is the ATM traffic class the WAN connection is using.
Service This displays the connection type, DSL port, Virtual Path Identifier, and Virtual
Channel Identifier. For the connection types, pppoe stands for PPPoE, ipoa
stands for IPoA, pppoa stands for PPPoA, mer stands for MAC Encapsulated
Routing, and br stands for bridging.