In a communication system that includes a communication terminal that originates and receives a call through a call control server, the call control server receives destination information from the communication terminal as a call request. The call control server checks an address of the communication terminal and determines based on the destination information whether transmission to a destination terminal is permitted for the communication terminal. Only when the transmission is permitted, the call control server originates a call to an address corresponding to the destination information to connect the communication terminal to the destination terminal.