SMPP UDRs(4.3)
The SMPP Receiver agent generates DELIVER_SM
 UDRs and receives DELIVER_SM_RESP
 UDRs, while the SMPP Transmitter agent receives SUBMIT_SM
 UDRs and generates SUBMIT_SM_RESP
 UDRs. The SMPP UDR types can be viewed in the UDR Internal Format Browser.
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