Abstract: A method, a device, and a non-transitory storage medium are described in which an blocking delivery service is provided. The service may use an identifier of a source end device, destination address information associated with a destination end device, and configurable criteria as a basis to block delivery of application service layer data. The service may be configured to apply to end devices based on an addressing scheme of the service. The service may be configured on a network device that provides an application service. The service may block delivery without the use of class of service or subscriber provisioning.

Abstract: A pitching/throwing device comprising a first ball, a second ball, and connector for connecting the first and second balls to each other. In the preferred embodiment, the balls are standard baseballs and the connector comprises a dowel screw. During use, the student holds the device by either ball and grips the ball in the appropriate manner for the pitch being thrown. Then, depending on the pitch to be thrown, the student flips or throws the ball to another while trying to impart the appropriate rotation to the ball. Because of the changed center of gravity resulting from the interconnection of the two balls, the act of imparting the desired rotation is made easier and the rotation of the ball is readily observable. This process is performed in several steps to first focus on the appropriate wrist/hand action and then to focus on the full arm delivery. The device can also be used by the student alone, by flipping the ball into the air while imparting the appropriate rotation to the ball.