This read-write Integer32, according to its source description, actually holds the bundle name of the multilink connection: when authentication is configured on the link, the bundle name equals the authenticated user name, and when authentication is not configured, it defaults to the literal string "multilink". An admin can read this to confirm whether a dial-on-demand or MP bundle is currently tied to a specific authenticated peer or is running unauthenticated under the generic name. For instance, on a link where PPP authentication is enabled for user "branch2", this object would report "branch2" rather than "multilink".