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.
Figure 8: Modules in ERX-14xx Models
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Note: Some line modules require a minimum amount of memory to be used with JUNOSe Release 5.3.0 or a higher-numbered release. See the ERX Module Guide for line module specifications. |
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