Reference section - SMPP
deliver_sm
SMPP deliver_sm
SMPP (Short Message Peer-to-Peer) is an open, industry standard protocol designed to provide a flexible data communications interface for the transfer of short message data between External Short Message Entities (ESME), Routing Entities (RE) and Message Centres (MC). The SMPP protocol is a means by which applications can send SMS messages to mobile devices and receive SMS from mobile devices.
4.3.1 deliver_sm Operation
The deliver_sm is issued by the MC to send a message to an ESME. Using this command, the MC may route a short message to the ESME for delivery.
4.3.1.1 deliver_sm Syntax
| Field Name | Size octets | Type | Description | Ref. |
| command_length | 4 | Integer | Set to overall length of PDU. | 4.7.4 |
| command_id | 4 | Integer | 0x00000005 | 4.7.5 |
| command_status | 4 | Integer | 0x00000000 | 4.7.6 |
| sequence_number | 4 | Integer | Set to a Unique sequence number. The associated deliver_sm_resp PDU will echo this sequence number. | 4.7.24 |
| service_type | Var. max 6 | C-Octet String | The 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 if not known by MC | 4.7.25 |
| source_addr_ton | 1 | Integer | Type of Number for source address. | 4.7.1 |
| source_addr_npi | 1 | Integer | Numbering Plan Indicator for source address. | 4.7.2 |
| source_addr | Var. max 21 | C-Octet String | Address of SME which originated this message. | 4.7.29 |
| dest_addr_ton | 1 | Integer | Type of Number for destination | 4.7.1 |
| dest_addr_npi | 1 | Integer | Numbering Plan Indicator for destination | 4.7.2 |
| destination_addr | Var. max 21 | C-Octet String | Destination address of this short message For mobile terminated messages, this is the directory number of the recipient MS | 4.7.8 |
| esm_class | 1 | Integer | Indicates Message Mode and Message Type | 4.7.12 |
| protocol_id | 1 | Integer | Protocol Identifier. Network specific field. | 4.7.20 |
| priority_flag | 1 | Integer | Designates the priority level of the message | 4.7.19 |
| schedule_delivery_time | 1 or 17 | C-Octet String | The short message is to be scheduled by the receiving MC or ESME for delivery. This field is only applicable if the short message is being forwarded to another MC. In this case it is the time at which the receiving MC should schedule the short message. Set to NULL if not scheduled. | 4.7.23.1 |
| validity_period | 1 or 17 | C-Octet String | The validity period of this message. This field is only applicable if this short message is being forwarded to another MC. In this case it specifies how long the receiving MC should retain the SM and continue trying to deliver it. Set to NULL if the current validity period is unavailable. | 4.7.23.2 |
| registered_delivery | 1 | Integer | Indicator to signify if a MC delivery receipt or an SME acknowledgement is required. | 4.7.21 |
| replace_if_present_flag | 1 | Integer | Flag indicating if delivered message should replace an existing message. | 4.7.22 |
| data_coding | 1 | Integer | Defines the encoding scheme of the short message user data. | 4.7.7 |
| sm_default_msg_id | 1 | Integer | Indicates the short message to send from a list of pre- defined (‘canned’) short messages stored on the receiving MC. This field is only applicable if this message is being forwarded to another MC. Set to NULL. If not known or applicable | 4.7.27 |
| sm_length | 1 | Integer | Length in octets of the short_message user data. | 4.7.28 |
| short_message | Var. 0-255 | Octet String | Up to 255 octets of short message user data. The exact physical limit for short_message size may vary according to the underlying network Note: this field is superceded by the message_payload TLV if specified. Ref. 4.8.4.36 Applications which need to send messages longer than 255 octets should use the message_payload TLV. In this case the sm_length field should be set to zero | 4.7.26 |
| Message Delivery Request TLVs | Var. | TLV | 4.3.3 |
4.3.1.2 deliver_sm_resp Syntax
| Field Name | Size octets | Type | Description | Ref. |
| command_length | 4 | Integer | Set to overall length of PDU. | 4.7.4 |
| command_id | 4 | Integer | 0x8000005 | 4.7.5 |
| command_status | 4 | Integer | Indicates outcome of deliver_sm request. | 4.7.6 |
| sequence_number | 4 | Integer | Set to sequence number of original deliver_sm PDU. | 4.7.24 |
| message_id | Var. Max 65 | C-Octet String | This field is unused and should be set to NULL | 4.7.14 |
| Message Delivery Response TLVs | Var. | TLV | 4.3.4 |
SMPP Tools and Services
Services from Melrose Labs (e.g. Tyr SMS Gateway and SMPP SMS Gateway ) support SMPP v5 and the earlier versions, v3.3 and v3.4.
SMPP Load Test
Perform an SMS load test using SMPP from your web browser and view the results in realtime. SMPP Load Test tool submits SMS messages using SMPP at the specified rate. Messages are sent to one or more mobile numbers in a range from a single source address or range of source addresses.
Use the online SMPP Load Test tool >
SMSC Simulator
Looking to test your SMS application or SMS-enabled application before connecting to a live SMS gateway or SMSC? SMSC Simulator enables you to test using SMPP v3.3, v3.4 and v5.
Read more about SMSC Simulator >
SMPP Clients
Send and receive SMS using an SMPP account and browser-based SMPP client.
- SMPP Client * - send/receive SMS and perform other SMPP operations
- SMPP Sender * - basic send SMS client
- SMPP Multi-Sender * - send SMS to multiple numbers from a CSV or spreadsheet
- SMPP Chat * - one or more two-way conversations using SMS and SMPP
- Message Broadcast - text messaging portal for use with any SMPP-capable messaging provider
* SMPP session between web browser and provider.
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 >
Message Hub
Message routing between applications (uses SMPP protocol). For use in IoT, chat applications, asyncronous notification in web applications, and other applications.
Message Hub documentation >
Send SMS programmatically with SMPP
Send SMS programmatically with SMPP using Python, Java, Go, Perl, C++, C#, Node.js, Ruby and PHP.