1 Scope

1.1 These requirements cover digital alarm communicator system units for use in central-station burglar-alarm systems, proprietary burglar alarm systems, police station connect burglar-alarm systems, residential burglar-alarm systems, residential fire warning systems, and home health care medical alert systems.

1.2 As covered by these requirements, a digital alarm communicator system consists of a digital alarm communicator transmitter interconnected to or integral with:

a)    A central-station burglar-alarm control unit,

b)    A proprietary burglar alarm control unit,

c)    A police-station-connect burglar-alarm control unit,

d)    A residential burglar-alarm control unit,

e)    A residential fire warning control unit, or

f)    A home health care medical alert control unit.

A need for off premises transmission will activate the digital alarm communicator transmitter that contacts a digital alarm communicator receiver located at a central-station or residential monitoring station through the telephone company's switched network (dial system) and transmits a message identifying the change in condition at the protected premises or residence.

1.3 The operation of a digital alarm communicator system is under the control of the owner or others interested in the property, the occupants of the residence, and the operators at the central-station or residential monitoring station.

1.4 If equipment covered by these requirements is intended for use in a combination burglar-alarm and fire-protective signaling system, the portion of the equipment serving a fire-alarm function shall comply with the Standard for Control Units and Accessories for Fire Alarm Systems, UL 864.

1.5 Service required to be provided by the central-station is covered by the Standard for Central-Station Alarm Services, UL 827.

1.6 A digital alarm communicator system may be classified as police-station connected if:

a)    It is used in combination with a protected premises control unit, an alarm sounding device, and an alarm housing that complies with the Standard for Police Station Connected Burglar Alarm Units and Systems, UL 365, and

b)    The signals are transmitted to a digital burglar-alarm communicator receiver located at a central-station that complies with the Standard for Central-Station Alarm Services, UL 827.

1.7 Devices installed on individual properties are further classified as to extent of protection at each location, according to the requirements covering installation and classification (of extent) of alarm equipment at individual locations as published in the Standard for Installation and Classification of Burglar and Holdup Alarm Systems, UL 681, that should be consulted by burglar-alarm installers.

1.8 Digital alarm communicator units for use in residential burglar-alarm systems shall comply with the Standard for Household Burglar-Alarm System Units, UL 1023, in addition to the applicable requirements in this standard.

1.9 Digital alarm communicator units for use in residential fire warning systems shall comply with the Standard for Household Fire Warning System Units, UL 985, in addition to the applicable requirements in this standard.

1.10 Digital alarm communicator units for use in home health care medical alert systems shall comply with the Standard for Home Health Care Signaling Equipment, UL 1637, in addition to the applicable requirements in this standard.

Summary of Topics

The fourth edition of the Standard for Digital Alarm Communicator System Units, UL 1635, was issued to revise the operation requirements.