The foundations are now in place to enable the voice alarm industry to develop solutions and install systems that meet the challenges for system integrity, availability and reliability demanded by modern buildings design in case of fire. It is unfortunate, however, that this situation is still confused by the existence of the older and contradictory standard, BS EN 60849 which has remained in place in spite of the withdrawal of its international equivalent, IEC 60849. The challenge for standard makers will be to review and rationalise this unsatisfactory situation.
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机译：现在已经建立了基础，以使语音警报行业能够开发解决方案并安装系统，以应对发生火灾时现代建筑设计所要求的系统完整性，可用性和可靠性方面的挑战。但是，不幸的是，这种情况仍然被存在旧的，相互矛盾的标准BS EN 60849所混淆，尽管已经废除了其国际等效标准IEC 60849，但该标准仍然存在。标准制定者将面临的挑战是审查并合理化这种不令人满意的情况。
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