To provide a call controller and a restriction presence/no presence decision method for performing priority control by services.

When a signal is transmitted from a subscriber terminal 5 (S1), a signal processing unit 41 acquires service identification information on a corresponding service, signal type identification information, and subscriber priority of a subscriber as the user of the subscriber terminal 5, and transmits the service identification information, signal type identification information, and subscriber priority to a restriction decision unit 42 to make a request to decide whether or not there are restrictions (S3). The restriction decision unit 42 acquires a restriction level stored in a restriction level storage unit 43 (S5), acquires service priority made to correspond to the service identification information from a restriction information storage unit 44 (S7), and acquires restriction information made to correspond to the service priority, signal type identification information, subscriber priority, and restriction level from the restriction information storage unit 44 (S9), thereby deciding whether or not there are restrictions on processing corresponding to the signal on the basis of the acquired restriction information.