This is the user manual of Huawei GTM900 Development Board. It describes how to use, maintain and repair the board.
This manual introduces the Huawei GTM900 development board (hardware model GT3011‑GF), highlighting its dual‑band 900 MHz/1800 MHz operation, built‑in TCP/IP stack, and support for standard and enhanced AT commands. It describes key features such as wide power input range, industrial‑grade EMC design, and customizable options.
Installation instructions cover the box contents, antenna mounting, DB9 data interface wiring, and power supply connection. Usage sections explain super‑terminal configuration, LED indicators, and AT command testing. The technical reference data provides voltage, current, frequency, performance, and mechanical specifications, while the precautions outline safety and regulatory considerations. This manual is written in Chinese.
| Working voltage range | DC +6V to +15V |
|---|---|
| Typical working voltage | DC +4.0V |
| SIM card voltage | +3.0V |
| Working current (call state) | 250 mA |
| Working current (idle) | 4 mA |
| Frequency bands | GSM 900 MHz / 1800 MHz |
| Receive sensitivity | -102 dBm |
| Transmit power | 2 W (900 MHz), 1 W (1800 MHz) |
| Interface baud rates | 9600‑115200 bps |
| Operating temperature | -30 °C to +55 °C |
| Dimensions | 9.5 × 5.5 × 2.5 cm (excluding antenna) |
| Weight | ≈100 g |
It supports GSM 900 MHz and 1800 MHz bands.
The board operates with a DC supply from +6 V to +15 V.
The module supports standard AT commands and enhanced AT command data mode.