Question: In a Point-to-Point Short Message Service (SMS) scenario, what is the primary purpose of a Mobile Station (MS) sending a 'notification' to the network in the originating case?
Option 1: To acknowledge receipt of a previously sent short message
Option 2: To request the network to send a specific short message
Option 3: To indicate the MS is busy and cannot receive new messages
Option 4: To inform the network that the MS has memory available to receive one or more new short messages
Explanation: A Mobile Station (MS) sending a 'notification' in the originating case informs the network about its readiness and capacity to receive new short messages, ensuring efficient message delivery by confirming sufficient memory, thus preventing potential failures due to memory constraints.