Specifying a BlackBerry MDS Connection Service as a central push server
At least one BlackBerry MDS Connection Service in your organization's BlackBerry Enterprise Service 10 domain must act as a central push server. Central push servers receive content push requests from server-side applications that are located on an application server or on a web server. Central push servers also manage push requests and send application data and application updates to BlackBerry device applications.
It is recommended that at least two BlackBerry MDS Connection Service instances exist in a BlackBerry Enterprise Service 10 domain. If two instances exist, by default, both instances are central push servers. If more than two BlackBerry MDS Connection Service instances exist in a domain, you can specify the instances that you want to act as central push servers.