What is the difference between a DVR and NVR? 2019

Posted by Louis Wood on

Back of Digital Video Recorder (DVR) & Power Supply vs PoE Network Video Recorder (NVR)

 

In this post we will discuss the differences between and NVR and a DVR.  The acronym DVR stands for Digital Video Recorder, and the acronym NVR stands for Network Video Recorder.

The term DVR refers to a recorder that records a video signal from an analog feed via coaxial cable. Digital in DVR means it is recording to a hard drive. NVRs also use hard drives. The term DVR originated first to distinguish the new hard drive recorders from older VCR recorders. NVR was the term created to distinguish IP camera recorders from analog camera recorders.

Stripped siamese wire with coaxial and 2 conductor power cable

Analog camera wiring most often uses a wire called "Siamese wire". Analog cameras are wired with the positive and negative (red and black) wires connect to an external power supply and coaxial cable into the DVR. The video of the “Siamese wire” is often RG6 or RG59 coaxial cable which terminates into a BNC connection. 

Male BNC Connector

BNC connections are difficult for non-professionals to install. 

An NVR is a recorder that records signals from an IP Camera that transmits its video feed via ethernet wiring. The term IP stands for internet protocol and is a standard for transmitting data on a network. IP Camera wiring uses CAT5/CAT6 ethernet cable from the camera to a PoE port on the NVR, PoE switch, or PoE injector. Most NVRs include Power over Ethernet (PoE) ports that provide power to the camera while at the same time transmitting data.

RJ45 plug connector on blue CAT5e

Ethernet jacks (RJ45) on CAT5 wiring are much easier to attach than BNC jacks on coaxial cable. Due to the prevalence of CAT5 wiring for all things networking related it is also very easy to find pre-made cables in your required length.

Due to the ease of use, lower margin of error, and superior future-proofing we here at DefendItYourself.com only sell IP Cameras and NVR systems. 

For Further Reading Check out:

https://en.wikipedia.org/wiki/Digital_video_recorder

https://en.wikipedia.org/wiki/Network_video_recorder

https://en.wikipedia.org/wiki/Power_over_Ethernet

https://en.wikipedia.org/wiki/Internet_Protocol

https://en.wikipedia.org/wiki/Category_5_cable

https://en.wikipedia.org/wiki/Coaxial_cable

https://en.wikipedia.org/wiki/BNC_connector

https://en.wikipedia.org/wiki/Modular_connector#8P8C

 


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  • I wanted to thank you for helping me learn more about DVR and NVR. I didn’t know that DVR is recording to a hard drive. I’m interested to learn how big the hard drive is or if people can have different sizes based on what they are recording. http://armstrongonewire.com/EXP/Index

    Taylor Bishop on

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