Also called administrative ride (for a privileged ride to the administrative floor).
Special control functions are enabled by a key-button or card reader: Requests are ignored, deleted or not accepted.
A privileged mode of control can be authorized from within the cab for example to retain the lift at one stop for a longer period (e.g. moving)
A special control embedded in the external control panel (e.g. for transporting beds) allows authorised persons to call a suitable lift - if a lift group is composed of differently sized lifts or if the beds lift should be separated from general public use (visitors).