DNS, IP tables, NTP and DHCP are among the few services that some folks configure separately on sipxecs 4.4 or older systems. Starting with the 4.6 release these services are integrated in a much tighter way. In order not to conflict with any custom configuration methods, these select services now have a "Unmanaged" setting you can set which allows you to configure the services yourselves.
NTP managed service means that you can configure NTP settings from sipXconfig UI and relay on sipXecs for starting / stopping NTP when needed (e.g. when configuration changed and needs to be applied). NOTE: not all possible NTP settings are exposed in sipXconfig UI
When NTP is marked as unmanaged service then sipXecs won't generate any configuration (/etc/ntp.conf) or issue any service start / stop commands. This is up to the admin, however some other system components (like phones) still need info about NTP configuration. That's why in addition to turning service in an unmanaged service, admin can also specify additional NTP servers phones or other components should default to.
The phone configuration will be automatically filled in with corresponding data
DNS managed service means that you leave sipXecs to configure (generating zone files, resolv.conf) and start / stop DNS when needed (e.g. when configuration changed and needs to be applied).
When DNS is marked as unmanaged service creating configuration files and stopping / starting service it's up to admin. Since some other system component still need info about DNS configuration admin can specify additional DNS servers.
The gateway configuration will be automatically filled in with specified servers
Same as for NTP and DNS, managed DHCP means that you want to run dhcpd on sipXecs and have all configuration / management performed by sipXecs. There are settings you could configure but certain are not possible (like multiple subnet configuration). We're looking for user feedback in order to expose settings that are mostly used.
When DHCP is marked as unmanaged service creating configuration files (dhcpd.conf) and stopping / starting DHCP service it's up to admin.