Training for employees operating SMS services

The following guides offer important information for the employees operating your SMS services. We recommend all SMS service providers to train their staff using these documents, to make sure they understand every aspect of the service they manage.

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The SMS network / The GSM SMS protocol explained
This is a detailed technical guide on how SMS messages are transmitted within mobile networks using the GSM protocol. It explains the key components of the SMS infrastructure, including network entities like MS, SME, and SMSC, and elaborates on the PDU (Protocol Data Unit) format used to encode SMS messages. The article outlines how messages are composed, encoded, transmitted, and stored, using technical parameters like PID, DCS, and VP. It also offers examples of sending and reading messages via modems using AT commands. This guide serves as a resource for those operating or managing SMS services.
The SMS network / The GSM SMS protocol explained
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The SMS PDU and SMS Text mode explained
This training guide provides an in-depth introduction to SMS PDU (Protocol Description Unit) mode, a powerful method for sending and receiving SMS messages in binary format. It explains how PDU mode enables greater control over message encoding and structure compared to standard text mode, supporting custom character sets, binary data, and compressed formats. The guide covers technical details of SMS encoding, message structure, and relevant AT commands used to configure and manage SMS transmission via GSM modems. It also includes examples of how to send and interpret messages using PDU mode. Understanding this mode is essential for advanced SMS communication and application development.
The SMS PDU and SMS Text mode explained

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