# Before You Configure Frame Relay

Before you attempt to configure a Frame Relay interface, configure the physical line interface over which Frame Relay traffic flows.

This process is described in the following chapters:

- Chapter Configuring Channelized T3 Interfaces in JunosE Physical Layer Configuration Guide
- Chapter Configuring T3 and E3 Interfaces in JunosE Physical Layer Configuration Guide

The procedures described in this chapter assume that a physical interface has been configured.