This document is a user manual for the AT-based SMS protocol between DTE and Modem, issued by AnyDATA. The manual provides detailed information on the process of sending and receiving SMS messages, as well as the related AT commands. It also includes the format of the extended SMS protocol and the newly added AT commands for SMS. Additionally, the document addresses issues related to SMS encoding and provides solutions.
The document provides a detailed description of the short message (SMS) service between a DTE and AnyDATA modem. It explains the overall process for sending and receiving SMS, the required AT commands, and the format of data frames.
It also lists all supported AT commands, their parameters, and the possible response codes. Additional sections cover error handling, fail‑safe timer settings, and Unicode‑to‑GB conversion utilities for developers. This manual is written in Chinese.