User's Manual

CONFIDENTIAL

1 Product Overview

1.1 Introduction

LC4R module uses GCT GDM7243Q chipset which is a wireless LTE FDD/TDD solution. The

chipset inside the module owns a dual core CPU. One of CPU (ARM1) is designed to run LTE

modem job; the other CPU (ARM0) is designed for router or other application.

In order to get full control, GCT designs three kinds of command sets.

 AT commands : 3GPP standard compatible commands to control network connection

 DM commands : GCT proprietary commands for calibration and NVM configuration

 UCFG commands : GCT proprietary application that manages LTE NVM (Non-Volatile

Memory) block used as command based interface at GDM7243 Linux kernel environment.

We will use them for different purposes.

1.2 System Structure

Figure 1: Device Application for CPE

From above diagram, there is an UCM (Unify Connection Manager) application running in ARM0

for connnection function. To simply dial process, using it is good suggestion, and AT commands are

required. If more specific dial requirement required, DM/UCFG commands are needed.