If the domain part of an address is telnum, the address local part is processed as a E.164 phone number.
The following steps are taken by the Router before it applies its Routing Table(s) and other routing methods:
If the phone number is not rerouted by any of the above methods, the Router processes it as a regular address.
To add a ENUM domain, enter its name into the empty field, and click the Update button. To remove a ENUM domain, remove its name from the field and click the Update button. Domains are used in the specified order.
See the PSTN section to learn more about PSTN and telephone number routing.