This document is the user manual for Chonghan CH-M2 wireless modem, which introduces the product's features, specifications, and application areas.
This manual describes the CH-M2 series wireless modem, including important safety notices, liability limits, and usage restrictions. It warns that the device must not be used near explosive operations, medical equipment, life‑support systems, or on aircraft, and that data transmission cannot be guaranteed.
The guide details AT command syntax, SMS functions, and lists the three model variants (CH-M2G5H5, CH-M2C3H2, CH-M2T2H1) with their USB 2.0 Type‑B interfaces. It also provides a bill of materials (power adapter, USB cable, antenna) and contact information for technical support. This manual is written in Chinese.
| Interface | USB 2.0 Type B Female |
|---|---|
| Supported Standard (CH-M2G5H5) | HSUPA |
| Supported Standard (CH-M2C3H2) | EV-DO |
| Supported Standard (CH-M2T2H1) | TD-HSDPA |
| Antenna | Standard antenna included |
No. The modem must be turned off and cannot be used on any aircraft, whether on the ground or in flight.
The command "ATA