Abstract: The invention provides a control means equipping a cloud infrastructure, said cloud infrastructure having a voice communication system instance (VCS) deployed or removed by an orchestration server, and being coupled when deployed, to a public telecommunication network and a network, said control means being arranged either for controlling said orchestration server to deploy said VCS instance and routing a call originating from a communication device connected to said public telecommunication network to a communication device connected to said network through said VCS instance, when the control means is set to a first state during a first scheduled time interval, or, for controlling said orchestration server to remove said VCS instance, and providing a minimum set of telephony services in response to said call when the control means is set to a second state during a second scheduled time interval. The invention also provides a method.