Reference section - SMPP


SMPP data_sm


4.2.2 data_sm Operation

The data_sm operation is similar to the submit_sm in that it provides a means to submit a mobile-terminated message. However, data_sm is intended for packet-based applications such as WAP in that it features a reduced PDU body containing fields relevant to WAP or packet-based applications. data_sm Syntax

Field Name Size octets Type Description Ref.
command_length4IntegerSet to overall length of PDU.4.7.4
sequence_number4IntegerSet to a Unique sequence number. The associated data_sm_resp PDU will echo this sequence number.4.7.24
service_typeVar. max 6C-Octet StringThe service_type parameter can be used to indicate the SMS Application service associated with the message. Specifying the service_type allows the ESME to avail of enhanced messaging services such as “replace by service_type” or control the teleservice used on the air interface.

Set to NULL for default MC settings
source_addr_ton1IntegerType of Number for source address.

If not known, set to NULL (Unknown).
source_addr_npi1IntegerNumbering Plan Indicator for source address.

If not known, set to NULL (Unknown).
source_addrVar. max 65C-Octet StringAddress of SME which originated this message.

If not known, set to NULL (Unknown).
dest_addr_ton1IntegerType of Number for destination.4.7.1
dest_addr_npi1IntegerNumbering Plan Indicator for destination.4.7.2
destination_addrVar. max 65C-Octet StringDestination address of this short message For mobile terminated messages, this is the directory number of the recipient MS.4.7.8
esm_class1IntegerIndicates Message Mode and Message Type4.7.12
registered_delivery1IntegerIndicator to signify if a MC delivery receipt or an SME acknowledgement is required.4.7.21
data_coding1IntegerDefines the encoding scheme of the short message user data.4.7.7
Message Submission TLVs or
Message Delivery TLVs
Var.TLV4.2.4 data_sm_resp Syntax

Field Name Size octets Type Description Ref.
command_length4IntegerSet to overall length of PDU.4.7.4
command_status4IntegerIndicates outcome of data_sm request.4.7.6
sequence_number4IntegerSet to sequence number of original data_sm PDU.4.7.24
message_idVar. max 65C-Octet StringThis field contains the MC message ID of the submitted message. It may be used at a later stage to query the status of a message, cancel or replace the message.4.7.14
Message Submission Response TLVs or Message Delivery Response TLVsVar.TLV 4.2.5

SMPP Analyser

The SMPP Analyser acts as an SMPP proxy, with the client application binding to the service and the service onward binding to the SMSC or SMS Gateway. Packet captures can be viewed in your browser or exported into Wireshark. Use the online SMPP Analyser >

SMSC Simulator

Looking to test your SMS application or SMS-enabled application before connecting to a live SMS gateway or SMSC? Our SMSC Simulator service allows you to test using the SMPP protocol v3.3, v3.4 and v5. Read more about SMSC Simulator >

SMPP Client

Test an SMPP account and service using the Melrose Labs SMPP Client . Use from your web browser. No software installation necessary.

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