Juniper Networks ERX Hardware 8 - Manual (Page 27)

ERX Overview
Figure 6: ERX-310 Router, Rear View (AC Model)
SRP I/O
module
I/O module
Grounding posts
ESD grounding jack
AC power inputs and
switches A and B
g013732
Figure 7: ERX-310 Router, Rear View (DC Model)
DC power inputs
and switches A and B
SRP I/O
module
I/O
module
Grounding posts
ESD grounding jack
g013733
ERX Modules
Each 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 8.
The front panel of each module contains a collection of status LEDs
(light-emitting diodes). For information about how to interpret the
LEDs, see “Troubleshooting” on page 103.
ERX Modules 9