Unsupported PDUs

The SMSC does not currently support the following SMPP Protocol PDUs, but they might be supported in future upgrades:

Notes:

1. We also don’t support the replace_if_present_flag in the submit_sm PDU.
2. If the ESME sends a query_sm PDU, the SMSC will reply with a query_sm_resp PDU, but the message_state value in the response might be incorrect. Therefore, we advise that you don’t use this PDU but rather enable registered_delivery in your submit_sm PDU, which will tell the SMSC to send delivery receipts to the ESME in the form of a deliver_sm PDU.