Huawei EchoLife HG520 User Manual page 22

The system provides eight PVCs. This page displays the
information of existing PVCs. Usually, you can use the default
settings.
You need to delete existing PVCs before adding new PVCs. You
can click New to add PVC. If you create new PVC, you need to enter
the VPI and VCI values provided by your ISP.
Note:
You can click the icon
or delete the PVC.
Figure 3-4 WAN configuration
to modify the configuration of existing PVCs
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