User manual

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6.8 DNS
6.8.1 DNS Server
If the Enable Automatic Assigned DNS checkbox  is selected, this router will
accept the first received DNS assignment from one of the DHCP enabled PVC(s). If
the checkbox  is not selected, enter the primary and optional secondary DNS
server IP addresses. Click Save to save the new configuration.
NOTE: You must reboot the router to make the new configuration effective.
6.8.2 Dynamic DNS
The Dynamic DNS service allows you to map a dynamic IP address to a static
hostname in any of many domains, allowing the CT-5072T to be more easily
accessed from various locations on the Internet.