CALL CONTROL APPARATUS, CALL PROCESSING CONTINUATION METHOD AND CALL CONTROL PROGRAM

An IA server (call control apparatus) 31 includes a plurality of execution units 311A to 311C that execute respective virtual machines of a plurality of disaster recovery stations corresponding one-to-one to a plurality of active stations including a call control server that performs call processing at normal times, the plurality of disaster recovery stations including a virtualized call control server that performs call processing when an active station is not operating, and a control unit 312 that controls an operation of the virtual machines of the plurality of disaster recovery stations. The control unit 312 activates, at normal times, the virtual machines of the plurality of disaster recovery stations corresponding one-to-one to the plurality of active stations inside of the one hardware apparatus, deactivates, when any active station of the plurality of active stations is not operating, a virtual machine of a disaster recovery station of the plurality of disaster recovery stations other than a virtual machine of a disaster recovery station of the plurality of disaster recovery stations corresponding to the active station not operating, and operates only the virtual machine of the disaster recovery station corresponding to the active station not operating. At normal times, each of the virtual machines of the plurality of disaster recovery stations repeatedly receives data related to call processing from a corresponding active station of the plurality of active stations at a predetermined timing.