Huawei EchoLife HG520 User Manual page 37

III. IPoA (Internet Protocols over ATM) Mode
It is recommended that you use the default DNS server and
gateway, which means you do not need to make configuration. If you
want to manually configure to IPoA mode, please ask the WAN IP
address, subnet mask, gateway address and DNS server address
from your ISP.
Figure 4-9 ATM PVC Configuration – IPoA Mode
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