Question: Upon receiving a short message TPDU from a Mobile Station (MS), what action does the MSC take if no errors are indicated by the Visitor Location Register (VLR) and the RP-DA parameters are correct?
Option 1: Returns a failure report to the MS due to missing MNRF investigation.
Option 2: Transfers the short message TPDU to the SMS-Interworking MSC (SMS-IWMSC) using "forwardShortMessage".
Option 3: Initiates an alerting procedure without involving the SMS-IWMSC.
Option 4: Requests additional information from the Home Location Register (HLR) before proceeding.
Explanation: According to the described functionality of the MSC in handling short messages, if no errors are indicated by the VLR and the RP-DA parameters are correct, the next step involves transferring the short message TPDU to the SMS-IWMSC. This is a crucial step for further processing and potential interworking with other networks or systems, highlighting the role of the MSC in facilitating end-to-end SMS delivery.