Juniper Networks E-Series - Manual (Page 32)

CHAPTER 1
E-Series Overview 1-10
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 1-11 .
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
I/O modules
I/O modules
SRP I/O
module
Line modules
Line modules
SRP modules
Connection via
passive midplane
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