This document is the AT command manual for Huawei GTM900 wireless module, which provides detailed explanations of the AT commands provided by the module.
This manual describes the AT command set supported by the Huawei GTM900 wireless communication module. It covers command syntax, parameter formats, and the purpose of each command, helping developers integrate the module into their applications.\n\nThe document is organized into chapters that follow relevant standards such as GSM Rec.07.07, ITU‑T Rec.V25ter, GPRS, and TCP/IP. It also includes sections on extended AT commands, ME control and status commands, and TIA IS‑101 commands, with tables of command codes and example usage. This manual is written in Chinese.