This object identifies the module index, relative to the slot, of the Logical Link referenced in a Logical Link up/down trap. Administrators use it alongside the slot and port indices to pinpoint the exact sub-component of a blade involved in a link event, on blades that have multiple modules per slot. For example, a link-down trap reporting a specific module index would direct an engineer to the corresponding module within that slot's blade rather than treating the whole blade as suspect.