This is the class-2 counterpart to gnGenXActNumOfInterfaceOnClass1, reporting how many of this radio's interfaces currently fall under the vendor's class 2 grouping rather than class 1 or class 3. It matters when a link is configured with mixed interface classes, for instance TDM interfaces in one class and Ethernet in another, and an admin needs to verify the actual class 2 interface count matches the provisioned service mix. A sudden drop in this count without a corresponding rise in class 1 or class 3 would suggest an interface dropped out of service entirely rather than simply being reclassified.