This guide provides an overview and description of the line modules (LMs), switch route processor (SRP) modules, and I/O modules available for the following Juniper Networks E Series Broadband Services Routers: ERX14xx models, ERX7xx models, and the ERX310 router.

Unless otherwise specified, all line modules pair with I/O modules to create a module combination. Each module combination provides particular capabilities and connections in an ERX router.

| Note: A release may support multiple versions of a module. For information, see Software Compatibility in JunosE System Basics Configuration Guide, Chapter 6, Managing Modules.

Table 1 lists the module combinations supported by ERX routers.

This book also contains four appendixes:

- Module Protocol Support
- Module LEDs
- Module Name Cross-Reference Information
- Product Reclamation and Recycling Program

For more information about ERX routers and modules, refer to the following books:

- Modules that have reached end-of-life—E Series End-of-Life Module Guide
- Module installation and maintenance—ERX Hardware Guide
- Managing ERX routers—JunosE System Basics Configuration Guide
- Configuring ERX modules—JunosE Link Layer Configuration Guide