SMPP API
This guide provides all the information you need to integrate SMPP into your applications for sending and receiving SMS messages efficiently and reliably.
Useful Resources
SMPP V5 - https://smpp.org/SMPP_v5.pdf
SMPP V5 DLR - https://smpp.org/smpp-delivery-receipt.html
SMPP Error Codes - https://smpp.org/smpp-error-codes.html
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