| 主权项 |
1. A call control server in a communication system that includes an IP voice communication terminal, an IP nonvocal communication terminal, and the call control server, in which each of the IP communication terminals are configured to transmit and receive a call through the call control server and transmit identification information that identifies an operator of the IP communication terminal that is a source of the call, and the call control server connects the IP communication terminal that is the source of the call to a destination terminal which is one of the IP voice communication terminal, the IP nonvocal communication terminal, and a non-IP communication terminal, the call control server comprising:
memory storing instructions; and one or more processors configured to execute the instructions such that the one or more processors are configured to, receive destination information and the identification information from the IP communication terminal that is the source of the call as a call request; check a source address of the IP communication terminal that is the source of the call, perform a first determining operation that includes determining whether or not the source address of the IP communication terminal that is source of the call is an address corresponding to the IP nonvocal communication terminal; check the address of the IP communication terminal that is the source of the call and the identification information, perform a second determining operation that includes determining based on the destination information whether or not a transmission from the IP communication terminal that is the source of the call to the destination terminal is permitted, when the first determining operation determines that the address of the IP communication terminal that is the source of the call is an address corresponding to the IP nonvocal communication terminal; obtaining an address of the destination terminal, and transmitting the call to the address of the destination terminal to connect the IP communication terminal that is the source of the call to the destination terminal, when the first determining operation determines that the address of the IP communication terminal that is the source of the call is not an address corresponding to the IP nonvocal communication terminal; and transmitting the call to an address obtained by a translation from the destination information, only when the second determining operation determines that the transmission is permitted, to connect the IP communication terminal that is the source of the call to the destination terminal, the destination information being an alias number, the one or more processors being configured to execute the instructions such that the transmitting the call to an address obtained by a translation from the alias number includes, determining whether the alias number starts with a first specified digit, if the alias number starts with the first specified digit,
translating the alias number to an address of a voice over IP (VoIP) gateway, and transmitting the call to the address of the VoIP gateway, and if the alias number does not start with the first specified digit,
translating the alias number into a corresponding IP address by retrieving the corresponding IP address from an IP address table, based on the alias number, transmitting the call to the destination terminal using the corresponding IP address, and not transmitting the call to the VoIP gateway. |
