Automatic provisioning is performed according to the schedule and each time the phone is switched on.

The phone obtains the provisioning server's URL from a DHCP server. Additional data for controlling provisioning can also be transferred along with the URL.

The phone obtains the provisioning server's URL from the redirect server.

Automatic provisioning of the phone is performed via the PBX.

This URL is required if it is not obtained via DHCP or a redirect server.