目前市场上有众多的数字视频光端机,且大部分工程商和用户缺乏相应的手段而无法判断各种指标的合理性与真实性。本文主要指出了两项在工程中比较关键且容易验证的技术指标,并着重从可靠性和实用性方面,分析了在“平安城市”监控系统中怎样选择数字视频光端机。 Currently there are many digital video Guangduan Ji on the market, and most of the contractors and users lack the appropriate means to judge the rationality of various indicators and authenticity. This paper mainly points out two technical indexes that are more critical and easy to verify in engineering, and focuses on how to choose digital video optical transceivers in the “Safe City” monitoring system from the aspects of reliability and practicability.