E-Series Modules - Juniper E-Series Installation And User Manual

1-10 CHAPTER 1
E-Series Overview

E-Series Modules

The system supports an SRP module and a selection of line modules. You
can use any line module for access or uplink. Access line modules receive
traffic from low-speed circuits, and the system routes the traffic onto
higher-speed uplink line modules and then to the core of the network.
Each module connects to a corresponding I/O module via a passive
midplane. See Figure
The front panel of each module contains a collection of status LEDs
(light-emitting diodes). For information about how to interpret the LEDs,
see Chapter 10, Troubleshooting.
Figure 1-11 Modules in ERX-14xx model
1-11.