Callom GmbH


The RESIDIUM Door Unit is an entry phone combining several functions in one screen only. The touch display serves as a bell button, name tag, light switch, video call-forwarding intercom as well as an input field for activating or deactivating the alarm system. The minimalistic visualization of the Door Unit has been designed to enable any visitor, regardless of his or her previous experience, to use it intuitively. At the same time, it serves to protect sensitive, safety-relevant functions from any unauthorized access.