This document is the product description manual of Huawei GTM900 wireless module, which introduces the specifications, interface signals, interface usage, working process, etc. of the product.
This manual introduces the Huawei GTM900 wireless module, covering its product positioning, physical dimensions, key features, and typical applications. It includes a logical block diagram and outlines the module’s role in GSM/GPRS networks.
The document details each interface (UART, SIM card, RTC backup, Audio, LPG), electrical characteristics, power‑on/off procedures, mechanical installation instructions, and a list of abbreviations used throughout the guide. This manual is written in Chinese.
| Dimensions (L×W×H) | 56.5 mm × 36 mm × 3 mm (including shield box) |
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Install the GTM900 by securing it with metal screws and ensure that all three screws are grounded.