This document covers the risk of entrapment of users in the car and in the well, and gives the technical requirements for the alarm systems for passenger and goods passenger lifts, as described in the EN 81 series. This includes: activation of the alarm, transmission of the alarm, information for use and maintenance, site testing to verify the requirements of this document have been met before the lift is used. Excluded are: the failure of the communication network (see Annex A), including mobile network signal strength or similar; the failure of the network power supply such that all the lifts in a geographical area create entrapment simultaneously. This document is not applicable to alarm systems for lifts installed before the date of its publication.