OSC-CSM and OSCM
Optical service channel cards provide bidirectional channels that connect all of the ONS 15454 DWDM nodes and transport general-purpose information without affecting the client traffic. ONS 15454 optical service channel cards include the Optical Service Channel Module (OSCM) and the Optical Service Channel and Combiner/Separator Module (OSC-CSM). The OSC-CSM and OSCM cards contain the following subtabs:

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