Unverified90% confidenceCautionTime unknown
不建议用DVR（模拟/同轴录像机）新装监控系统，DVR接同轴线、分辨率与扩展性受限，除非是复用老旧同轴布线或需接现有模拟摄像头；新装应选NVR+网络摄像头方案
1
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90%
Confidence
Long-term
Relevance
-
First Seen
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Unverified老旧同轴线改造或已有模拟摄像头的场景应选DVR或支持AHD/TVI/CVI/CVBS的混合录像机，全新布线场景优先NVR以获得更好画质和POE供电81% similarUnverified仅需查看单个或少数摄像头且不需长期存储时不建议买NVR，直接用带TF卡或云存储的一体机摄像头更简单省成本，NVR适合4路以上或需要大容量长时录像场景75% similarUnverified购买套装前确认后期扩展上限：4路NVR只能接4个摄像头，若未来有加装需求应直接选8路NVR（价差不大），避免二次更换主机74% similarUnverified选购NVR时接入路数应预留冗余：现有4个摄像头选8路NVR，因为POE供电NVR的网口数即录像通道上限，后期加装摄像头无法扩展只能更换主机73% similarUnverified选择NVR套装时，NVR通道数应比当前摄像头数量多1-2路，例如4路摄像头选8路NVR，为后续扩展预留通道，否则加装摄像头需整机更换73% similar
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