| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication system, etc. capable of performing nuisance call blocking without requiring the manual operation of a user.SOLUTION: A communication system includes: a communication terminal 10 connected to a home gateway 20; the home gateway 20 for making an inquiry to a server 30 about whether an originating telephone number is the number of a nuisance call when an incoming call is received by the communication terminal 10, and notifying the communication terminal 10 of the possibility of a nuisance call when the inquiry result has the possibility; a black list recording unit 32 for recording the telephone number having the possibility of a nuisance call and an update date; and the server 30 for notifying the home gateway 20 of a determination result on whether the originating telephone number has been registered in the black list recording unit 32 in response to the inquiry from the home gateway 20, and additionally registering the telephone number in the black list recording unit 32 by following a predetermined condition or deleting the registered telephone number. |
