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SMPP

The Short Message Peer to Peer Protocol (SMPP) is the way that SMS messages can be exchanged between different parties, usually between a provider and an aggregator. Using a simple TCP protocol based approach, plus some PEAR libraries, it is possible to send and recieve SMS messages.

The PEAR libraries merely encode and decode the PDU packages, so I have a small layer which can sit on top of them which does the actual creation of the packages and communication between client and server.

It would be sensible to read the following:

SMPP - Wikipedia
SMPP PEAR libs
SMPP Protocol Description

          

SMPP API

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SMPP API Docs

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