In the March/April 2008 edition of IMS A Journal, I attempted to answer the following question:rnQuestion: We don't know what to do! We just found out one of our major industrial clients plans to switch their telephone service from the public switched telephone network to one of the VoIP (Voice over Internet Protocol) service providers, specifically the local cable company. How will this affect the operation of our fire alarm system and its connection to a central supervising station?rnThe answer that I gave based on NFPA 72-2007, National Fire Alarm Code, accurately dealt with issues relating to standby power and monitoring the integrity of the telephone connection between the protected premises and the first telephone company wire center.
展开▼
机译：在IMS A Journal的2008年3月/ 4月版中，我试图回答以下问题：问题：我们不知道该怎么办！我们刚刚发现我们的一个主要工业客户计划将他们的电话服务从公用交换电话网络切换到VoIP（互联网协议语音）服务提供商之一，特别是本地电缆公司。这将如何影响我们的火灾报警系统的运行及其与中央监控站的连接？rn我根据NFPA 72-2007（国家火灾报警代码）给出的答案准确地处理了与备用电源有关的问题并监控了系统的完整性。受保护场所与第一个电话公司有线中心之间的电话连接。
展开▼
