Indication whether the device has registered using 1.0 Class of
Service or 1.1 Quality of Service.
An unregistered CM should indicate 1.1 QOS for a
docsIfDocsisBaseCapability value of Docsis 1.1/2.0. An unregistered
CM should indicate 1.0 COS for a docsIfDocsisBaseCapability value
of Docsis 1.0.
This object mirrors docsIfCmDocsisOperMode from the docsIfExt mib.