| 摘要 |
A communication system according to the present invention shares terminal identification information used for identifying a terminal that sends a spam phone call, with another communication system belonging to another network provider, and includes: a storage section that stores terminal identification information of a terminal that sends a spam phone call; a transmission section that transmits the terminal identification information stored in the storage section to the other communication system; a reception section that receives, from the other communication system, the terminal identification information used for identifying the terminal that sends the spam phone call; a registration section that registers the terminal identification information received by the reception section in the storage section; and a spam phone call determination section that determines whether or not there is a match between terminal information indicating information of an outgoing call terminal that sends a connection request, and the terminal identification information stored in the storage section, thereby determining whether or not the outgoing call terminal sends a spam phone call. |
