This section describes how to start and stop the Cisco CallManager and other available services. When you stop and start a Cisco CallManager, all Cisco IP phones and gateways currently registered to that Cisco CallManager fail over to their secondary Cisco CallManager. All other installed applications that are homed to that Cisco CallManager, such as conference bridge and Cisco Messaging Interface (CMI), also stop and start. Devices and phones only restart if they cannot register with another Cisco CallManager.
Caution Stopping Cisco CallManager stops call processing for all devices controlled by that Cisco CallManager. If possible, avoid stopping and starting the CallManager service during peak hours as this may cause slow performance and extended outages for devices.
You can start and stop services from Windows or from the control center in Cisco CallManager Serviceability. For information on using the control center, refer to the Cisco CallManager Serviceability Administration Guide and the Cisco CallManager Serviceability System Guide.