Application developers can create BlackBerry® Java® Applications to manage application-reliable push requests. When a BlackBerry Java Application receives an application-reliable push request, it sends a delivery confirmation message to the BlackBerry MDS Connection Service, which sends the message to the server-side push application. You must specify the device port numbers that the BlackBerry Java Applications listen on for application-reliable push requests.

1. In the BlackBerry Administration Service, on the Servers and components menu, expand BlackBerry Solution topology > BlackBerry Domain > Component view > MDS Connection Service.
2. Click the instance that you want to specify device ports for.
3. Click Edit instance.
4. In the Device ports enabled for reliable pushes field, type the device port number.
5. Click the Add icon.
6. Repeat steps 4 to 5 for each device port number that you want to add.
7. Click Save all.
8. Click Restart instance.

To manage your organization's system resources, you can configure storage settings for push requests that are stored in the BlackBerry® Configuration Database.

1. In the BlackBerry Administration Service, on the Servers and components menu, expand BlackBerry Solution topology > BlackBerry Domain > Component view.
2. Click MDS Connection Service.
3. Click Edit component.
4. In the Push message settings section, in the Maximum number of push messages stored field, type the number of push requests that you want the BlackBerry Configuration Database to store.
5. In the Maximum push message age field, type the maximum length of time, in minutes, that you want the BlackBerry Configuration Database to store a push request before the BlackBerry® Enterprise Server deletes it from the BlackBerry Configuration Database.
6. Click Save all.

You can configure the maximum number of push connections that a BlackBerry® MDS Connection Service can process at the same time. The BlackBerry MDS Connection Service queues the push connections that exceed this limit.

1. In the BlackBerry Administration Service, on the Servers and components menu, expand BlackBerry Solution topology > BlackBerry Domain > Component view > MDS Connection Service.
2. Click the instance that you want to configure active connections for.
3. Click Edit instance.
4. In the Push access protocol section, in the Maximum number of active connections field, type a number.
5. Click Save all.
6. Click Restart instance.

The BlackBerry® MDS Connection Service queues push connections when the number of connections exceeds a limit that you specify. You can configure the maximum number of push connections that a BlackBerry MDS Connection Service can queue. The BlackBerry MDS Connection Service sends a "service unavailable" message to BlackBerry devices when the number of pending push connections in the queue exceeds the limit.

1. In the BlackBerry Administration Service, on the Servers and components menu, expand BlackBerry Solution topology > BlackBerry Domain > Component view > MDS Connection Service.
2. Click the instance that you want to configure the maximum number of queued connections for.
3. Click Edit instance.
4. In the Push access protocol section, in the Maximum number of queued connections field, type a number.
5. Click Save all.
6. Click Restart instance.