This TruthValue object reports whether a physical module has at least one port capable of forming the VSL connection between the two core switches in a virtual switch setup. Knowing which modules are VSL-capable tells an admin where physical VSL cabling can legally be terminated when building or expanding a Virtual Switching System. For instance, when planning a second VSL link for redundancy, an engineer would query this object across candidate modules to find one that actually supports VSL ports.