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Reference section - SMPP

unbind

SMPP unbind

SMPP v5

4.1.1.8 unbind Syntax

The purpose of the SMPP unbind operation is to deregister an instance of an ESME from the MC and inform the MC that the ESME no longer wishes to use this network connection for the submission or delivery of messages.

Thus, the unbind operation may be viewed as a form of MC logoff request to close the current SMPP session. The format of the SMPP unbind PDU is defined in the following table.

Field NameSize OctetsTypeDescriptionRef.
command_length4IntegerDefines the overall length of the PDU.4.7.4
command_id4Integer0x000000064.7.5
command_status4IntegerIndicates status (success or error code) of original bind_transceiver request.4.7.6
sequence_number4IntegerSet to a unique sequence number.

The associated unbind_resp PDU will echo the same sequence number.
4.7.24

4.1.1.9 unbind_resp Syntax

The SMPP unbind_resp PDU is used to reply to an unbind request. It comprises the SMPP message header only.

The format of the SMPP unbind_resp PDU is defined in the following table.

Field NameSize OctetsTypeDescriptionRef.
command_length4IntegerDefines the overall length of the PDU.4.7.4
command_id4Integer0x800000064.7.5
command_status4IntegerIndicates outcome of original unbind request.4.7.6
sequence_number4IntegerSet to sequence number of original unbind request.4.7.24

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