What is SMPP Connections?

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When an ESME establishes a connection using SMPP, this can be done in three modes i.e. bind_transmitter / bind_receiver / bind_transceiver

  1. Transmitter, the ESME can only submit messages to the SMSC (bind_transmitter)
  2. Receiver, the ESME can only receive messages or delivery reports from the SMSC(bind_receiver)
  3. Transceiver, the EMSE can both send and receive messages to and from the SMSC(bind_transceiver)