the primary and secondary ports or the slected port in rtwActivePort.
When rtwModeControl is selectAB then this object is not selectable and
a read of this value will always return not-applicable.
Sources for this description
Circitor
Parsed from LC-PHYSICAL-ENTITIES-MIB.mib · LC-PHYSICAL-ENTITIES-MIB
Source file: Download LC-PHYSICAL-ENTITIES-MIB.mib