Reference section - SMPP


SMPP alert_notification

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.

4.1.3 Alert Notification Operation

SMPP v5 Alert Notification reference

The alert_notification PDU is sent by the MC to the ESME across a Receiver or Transceiver session. It is sent when the MC has detected that a particular mobile subscriber has become available and a delivery pending flag had been previously set for that subscriber by means of the set_dpf TLV (ref.

A typical use of this operation is to trigger a data content "Push" to the subscriber from a WAP Proxy Server.

Note: There is no associated alert_notification_resp PDU. alert_notification Syntax

Following is the format of the SMPP alert_notification PDU.

Field NameSize OctetsTypeDescriptionRef.
command_length4IntegerDefines the overall length of the PDU.4.7.4
sequence_number4IntegerSet to a unique sequence number.4.7.24
source_addr_ton1IntegerType of Number for alert SME.4.7.1
source_addr_npi1IntegerNumbering Plan Indicator for alert SME.4.7.2
source_addrVar. max 65C-Octet StringAddress of alert SME.4.7.29
esme_addr_ton1IntegerType of Number for ESME address which requested the alert.4.7.1
esme_addr_npi1IntegerNumbering Plan Indicator for ESME address which requested the alert.4.7.2
esme_addrVar. max 65C-Octet StringAddress for ESME which requested the alert.4.7.11
Optional TLVs:
TLV NameTypeDescription
ms_availability_statusTLVThe status of the mobile station4.8.4.39

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.

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 session between web browser and provider.

SMS Code Bench

SMS messaging code sample and development playground. Collection of editable and runnable code samples in a variety of languages for different SMS interactions.
SMS Code Bench >

Send SMS programmatically with SMPP

Send SMS programmatically with SMPP using Python, Java, Go, Perl, C++, C#, Node.js, Ruby and PHP.

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 >

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 >


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