UL 2524 BULLTIN-2017 UL Outline for Investigation In-building 2-Way Emergency Radio Communication Enhancement Systems.pdf
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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
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