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Redundant power solution for IP cameras: Simultaneous PoE and AC/DC

Matt Golueke November 20, 2014 21:02 PM

EthernetAn IP camera surveillance camera system, or any other security system for that matter, is only as resilient and dependable as the power to the system.

Aside from overall UPS power supply systems for the building, network, or security system headend (see Orion Power Systems info here), security practitioners need to consider power redundancy at the edge device.

Comnet_PoE_Injectors_imageMost IP cameras are now capable of Power over Ethernet (PoE) which allows the camera to be powered by the network switch or an ethernet power injector. See Comnet for creative PoE options. As this convenient power solution has become the norm among security practitioners and IT professionals, many are forgetting that the power is only as reliable as the network switch supplying it.

Here is a short overview of PoE basics:

Step 1: don't forget to UPS your network infrastructure devices. (see Orion Power Systems info here)

Let's say your network switch fails. Now what?  No power. No video stream to the NVR. No recorded video. No evidence of the crime. Sounds like a way for a smart criminal to avoid detection.

Step 2: consider adding redundant/parallel power directly to the camera...that's right, dual power sources directly into the camera. Many cameras can accept both PoE and 24VAC or 12VDC at the same time.

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Let's think that network switch failure through a bit more. Why not provide dual power AND record locally in the camera to a small SD card? Now the camera will continue to operate and record locally even though the network switch has failed...whether due to deceptive efforts or due to simple equipment failure. Check out IPVM's take on edge recording here.

We took a much closer look at the reliability and positioning of SD card edge recording in a recent blog post.  Check out Edge Recording: IP Cameras with onboard SD details here. We cover the following topics:

  • Is there a more reliable way to deploy SD card recording? 
  • What is an SD card?
  • What storage size capacity do the cards come in?
  • What are the best practices for using an SD card for recording?
  • Is there software to view the recorded video?
  • Is there an app?
  • How hard is it to program the SD card recording at the edge?
  • What types of cameras can do SD card recording? How much do they cost?

 

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Take a look at this document.  It outlines the secondary power solutions that can be deployed in parallel with PoE or high PoE within the Bosch IP camera lineup.

 

 

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Learn more about Bosch IP video smart, secure, reliable solutions.

 

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