Router User Manual

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
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Figure 7: E
RX-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
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ERX Mod
ules
Each sy
stem supports an SRP module and a selection of line mod ules. You can
use any line m odule for access or uplink . Access line modules receive traffic
from low-speed circuits, and the system routes the traffic onto higher-spe ed
uplin
k line modules and then to the core of the network.
Each m
oduleconnectstoacorrespondingI/Omoduleviaapassive
midplane. See F igu re 8.
The front panel of each module contains a collection of status LEDs
(light-emitting diodes). For information ab out how to interpret the
LEDs,
see “Troubleshooting” on page 103.
ERX Modules 9