# Configuration Overview

This topic describes how to configure Video Access Toolkit 3G-324M over IP to run in a back-to-back configuration.

A back-to-back configuration requires two TX 4000 boards and two CG 6565 boards, as shown:

Use either two Ethernet crossover cables to connect both pairs, or use a hub to connect each board. If you use a hub, you will be able to use a packet analyzer tool (for example, WireShark) to snoop the signaling and media traffic.

You can also use a two TX boards and one CG 6565 board with media looped back over both CG 6565 Ethernet interfaces: