The MuxModule object represents the Ciena CN 4200 VMUX card, Ciena’s channelized, managed optical multiplexer-demultiplexer card. This card is critical to O-USPR and 2-degree ROADM protection schemes that the CN 4200 may be set up to implement.

The VMUX card also contains a passive filter module used to support multi-degree ring and mesh topologies. Discovery will find provisioned passive filters and model them as MuxModules. If the passive filter is used without provisioning, it will not be discovered from the MIB walk and must be created manually.