This European Standard specifies requirements for SPT used in I&HAS to transmit alarm and other messages to a location remote from the supervised premises. NOTE1 Requirements for the transmission of alarms are given in the EN/TS50136 series of standards. EN50136‑2 gives requirements for SPT for use in any type of alarm system (e.g. fire, social care, intrusion, etc). This European Standard gives specific requirements for SPT used in Intrusion and Hold-up Alarm Systems (I&HAS) and should be used in combination with EN50136‑2 . The requirements of this European Standard apply to different types of SPT including separate SPT, SPT located within the housings of other I&HAS components and also when the SPT functionality is integrated with the CIE or other parts of an I&HAS. NOTE2 To facilitate the differing requirements this European Standard includes a categorisation with three types (X, Y and Z). This European Standard does not give requirements for the ATS network or performance.