1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSubject 864, 2572 (864, 1481, 1711, 2572)December 22, 2017TO: Subscribers to ULs Standards Service forControl Units and Accessories for Fire Alarm Systems,Power Supplies for Fire-Protective Signa
2、ling Systems,Amplifiers for Fire Protective Signaling Systems, andMass Notification SystemsSummary of TopicsThis bulletin announces the availability of the Outline of Investigation for In-building 2-WayEmergency Radio Communication Enhancement Systems, UL 2524Underwriters Laboratories Inc. has issue
3、d an Outline of Investigation for In-building 2-Way EmergencyRadio Communication Enhancement Systems. The outline covers products (e.g. repeater, transmitter,receiver, signal booster components, external filters, and battery charging system components) used forin-building 2-way radio emergency radio
4、 communication enhancement systems installed in a locationto improve wireless communication at that locationManufacturers interested in submitting equipment for Listing should contact ULs Customer Service at1-877-854-3577 or e-mail at .The UL 2524 Outline is available for purchase from COMM-2000 at
5、151 Eastern Ave, Bensenville, IL60106, by phone in the USA and Canada: 1-888-853-3503, by fax in the USA and Canada: 1-888-853-3512, by phone from other countries: INT+1 415-352-2168, by fax from other countries: INT+1630-932-7387, or from COMM-2000 on-line at http:/m-.UNDERWRITERS LABORATORIES INC.
6、 REVIEWED BY:Larry ShudakPrincipal EngineerPrimary Designated Engineers - Life SafetyTechnologiesNORTHBROOK OFFICEPhone: 847-664-2791E-mail: Copyright 2017 Underwriters Laboratories Inc.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 22, 2017SUBJECT 2572 -2-No Text on This Page
