Question: In a CAMEL environment, when an `InitialDPSMS` procedure is triggered by the smsSSF after detecting a TDP-R in the smsSF FSM, what is the primary purpose of this operation?
Option 1: To notify the gsmSCF of a successful Short Message delivery to the served subscriber.
Option 2: To request routing information from the gsmSCF for forwarding the Short Message to another network.
Option 3: To seek instructions from the gsmSCF on how to complete the Short Message submission to the SMSC or delivery to the served subscriber.
Option 4: To update the gsmSCF with the location information of the MSC/SGSN for a served subscriber.
Explanation: The `InitialDPSMS` procedure is initiated by the smsSSF to request guidance from the gsmSCF. This operation determines next steps in handling the Short Message, whether for submission to the SMSC or delivery to the intended recipient, aligning with CAMEL's service control and customization needs.