Line module slots are located in the front of each ERX chassis, while I/O module slots are located in the rear. See ERX Overview for front and rear views of ERX routers.
In ERX-14xx models, modules mount vertically in a chassis with 14 slots. In ERX-7xx models and ERX-310 routers, modules mount horizontally in a chassis with 7 slots and 3 slots, respectively. See Figure 16.
Figure 16: Orientation of Line Modules in ERX Routers
For details about available line modules and compatibility between line modules and SRP modules, see the ERX Module Guide.
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