User's Manual

LTE Module Series
EC21 Hardware Design
EC21_Hardware_Design Confidential / Released 10 / 94
1 Introduction
This document defines the EC21module and describes its air interface and hardware interface which are
connected with your application.
This document can help you quickly understand module interface specifications, electrical andmechanical
details, as well as other related information of EC21 module. Associated with application note and user
guide, you can use EC21 module to design and set up mobile applications easily.