You can start and stop the Conferencing services for the entire cluster using the control-cluster.sh script.
To stop Conferencing Services, enter:
./control-cluster.sh --cluster <your-cluster> [--single-host <your-host>] stop
To start Conferencing Services, enter:
./control-cluster.sh --cluster <your-cluster> [--single-host <your-host>] start
Use the --single-host argument with the script if there is only one host in your cluster.