• Transmitter / receiver mode: capable of submitting messages, querying the status of messages and system parameters but it is not able to receive short messages.To be capable of receiving delivery receipts of short messages, it will be necessary also to bind as a receiver. 
  • Transceiver bind: SMPP version 3.4 introduced the transceiver type of connection. It is similar to having a transmitter and receiver connection over the same network link and allows submitting and receiving.