Communication system and communication control method

A communication control method used in a communication system which controls communication between a calling terminal connected to a calling-side communication network and a called terminal connected to a called-side communication network, wherein:

• an access request transfer device in the calling-side communication network transfers an access request, which has been sent from the calling terminal, to the called-side communication network;
• an access request cancel notice receiving device in the calling-side communication network receives an access request cancel notice, which indicates cancellation of the access request, from the called-side communication network;
• an access-disable terminal information registering device in the calling-side communication network registers identification information of the calling terminal which sent the access request in an access-disable terminal storage device, based on the received access request cancel notice;
• and
• a restriction request information sending device in the calling-side communication network sends restriction request information, which indicates the identification information of the calling terminal registered in the access-disable terminal storage device, to a communication restriction apparatus which controls restriction for each communication from the calling terminal and stores corresponding restriction information, based on the restriction request information.