SMPP PDU Operation Definitions
The following SMPP PDU Operation Definitions are taken from the SMPP 3.4 specification.
bind_*_resp– Where ‘
*’ is replaced by
transcieverdepending upon circumstances. The SMPP bind_*_resp PDU is used to reply to a bind request of the specified type.
deliver_sm– The deliver_sm is issued by the SMSC to send a message to an ESME. Using this command, the SMSC may route a short message to the ESME for delivery.
enquire_link– This message can be sent by either the ESME or SMSC and is used to provide a confidence check of the communication path between an ESME and an SMSC.
submit_sm– This operation is used by an ESME to submit a short message to the SMSC for onward transmission to a specified short message entity (SME).
unbind_resp– The SMPP unbind_resp PDU is used to reply to an unbind request. It comprises the SMPP message header only.