ATCOM A20 - Software Features and Functionality; Network Configuration Options; Management and Maintenance Procedures; Supported Communication Protocols

A20/A21/A20W/A21W Quick Start Guide
ATCOM TECHNOLOGY CO., LIMITED
1 Installation and access
1.1 Connection
Set up A20/A21/A20W/A21W as below:
1.2 Installation instruction
1. Desktop installation
A. Put the bottom side of the IP phone upside and press the plate into the slot,
please refer the picture as below: