OSC-CSM

OSC-CSM provides the equivalent functionality of the OSCM interface card. In contrast to the OSCM interface, the OSC-CSM provides on-board circuitry to separate or combine the optical service channel from the composite DWDM fiber signal. Therefore, it is used for MSTP configurations that do not employ the booster amplifierthat is, passive systems.

After the OSC is extracted from the composite DWDM fiber signal and distributed to the OSC interface, the remaining composite signal is distributed to optical add/drop multiplexer (OADM) units for customer channel access.

Unlike the OSCM, the OSC-CSM can be operationally inserted in any of the service interface slots of the ONS 15454 shelf assemblySlots 16 or 1217. Figure 9-4 shows the faceplate layout of the OSCM.

Figure 9-4. OSC-CSM Card Faceplate Diagram