Patent ID: 7292843

Claim:
A function-limiting device, comprising: receiving means to receive a signal sent from a mobile device when signals sent from a communications terminal are not received within a prescribed time, wherein said signal sent from the mobile device to the receiving means is a disconnection signal notifying interruption of communications with the communication terminal; and function-limiting means to limit functions related to the mobile device when the signal is received by the receiving means; the receiving means configured to receive position information indicating the current position of the mobile device together with said disconnection signal; and movement determining means to determine whether or not the mobile device is moving, based on changes over time in the position information received by the receiving means, wherein, when the movement determining means determines that the mobile device is moving, the function-limiting means disables all reception for the mobile device, and when the mobile device is determined to be stationary, the function-limiting means enables only reception for the mobile device from a previously registered call source.