TON and NPI are provided as configuration parameters while creating the SMPP driver instance. TON stands for type of number. NPI stands for national plan indicator. These parameters are used to configure the SMSC (Short Message Service Center). Because th

Using SMPP you can retrieve delivery report in the following ways. First choice is to set registered_delivery parameter to 1 when you send submit_sm PDU. This case SMSC should send you deliver_sm PDU with esm_class = 0x04 containing delivery report.

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