Hikvision HDTVI Power Over Coax Tested

By Ethan Ace, Published Feb 05, 2019, 10:50am EST

After years of delay, Hikvision's Power Over Coax (PoC) HDTVI models are finally shipping, aiming to make HD analog installs as simple as PoE, with only one cable required. But with IP camera prices dropping over the past few years, and new generations of cameras available, can TVI stand up against IP?

We bought and tested PoC camera and DVR models, looking at these questions:

  • How does PoC work? Is it plug and play?
  • Does cable length or quality affect PoC?
  • Does PoC affect image quality? How does it compare to non-PoC cameras?
  • How do PoC cameras compare to IP models?

See our results inside.

Models included in this test:

*******

** *** *****, *********'* Power **** **** *** cameras *** **** ********* beyond **************, **** ** practical ******** ****** ** image ******* *** ** power **** ****** ** over *,***' ** **-** cable, **** **** *********'* 200m **************. ************, ***** quality ** *** *** models *** ******* ******* to ********** ** ******, with ******* ******* ** test ********.

***** **** ******** **** may **** ** ********** to ******** *** ***** supplies, ******** ***** ***** cabling ***** ***** ***** enough ** ** **** condition, ***., ** *** models ****** ** ********* these ******.

*******, *** ****** *** much ****** ** ***** to ** ******* **** traditional *** *** ***** HD ****** *******, **** about **-**% ****, ********* on **********, ********, ***. Because ** **** ***** looking ** *** ******** are ****** ** ***** choose **, ** ************ is ** ******, ** not ******* **** ******* coaxial ******, **** * broader ********* ** ****** models ***** ** *** lock ***** **** *********'* PoC *********.

Lower ******* **** ** / **** ****** **** ******** ***

*** ******* *** **** are ****** ** ***** to ********** ** *******/**** than ******* *** *******, though ***** ******* *****.

*** *******, *** ********* DS-2CE56H5T-IT3E ***** ***~$*** *** ******, ***** $** **** than *** *** ** turret (**-**********-*),~$*** ******. ** ********, *** non-PoC *** ****** ***** for ****~$** ********** ********** *******, **** some ************ ******* ******* it ***

*********, *** **** *** significantly **** ********* **** non-PoC ******. *** *******, the **-*******-**/* *** ***** sells *** ~$*** ******, very ***** ** *********'* 8-channel ***, ***** ***** for ~$***. ** ********, the ***-*** *** ********** is ~$*** (**-*******-**).

PoC ********

***** **** **** ********* similarly ** ***** ***** equipment, ****** ***** **** only ******* *** ****** and *** **** ****, with ** ******** ***** connection ********. *** ****** takes * *** ******* to ***** ** *** send *****, ******* ** non-PoC *** *******.

** **** **** ***** operation ** *** ***** below:

********* ***** **** *** cameras ***** *** ********* terms: ***.** (**) *** PoC.at (***), ***** ***** terminology **** *** ***.***/******* **** *****************, *** *** ********** unrelated. *** ************* *** **** *** use *** **** *******/******* as ***.

PoC ******* *** *** ***** ********* ****

*** *** ** ********* and ********** *** *** DVR's ***** *********, *** it ************** ** *** *** interface. ***** *** *** how **** ******* *** connected *** ** **** variant (***.**/**), *** *** specific **** *** ****** or *****. ***** *** also ***** ** **** power ** *** *** per *******.

**** **** *** **** at *** ****** ** this ****** ** *******, overlapping *****, *** ********* to **** ** ****, 1080p, *** ** ***********.

Minimal ***** ******* *******

*** *** ****** ** no ****** ** ***** quality ** *** *****. At ***'+ ***** *******, some *************** ************* *******, **** ** the ******* **** ***** along *** ***** ** the ***** *****, ****** these ********* *** ** the *** *** ** the *** **** (****/****, depending ** **********).

***** ******* **** *** seen **** ********** ******** the ****** ***** ******* coax ***** ** *** same ********, ****** ******* were *********** ******* **** PoC **** ** *** off.

No ***** ***** ****** ****

** *** *****, *** worked ******* ****** ** almost *,***' ** **-** cable, **** **** *********'* specified **** ***** (**** for *-* **). ** saw ** ****** **** power ** ****** ******, with ********** **, ****, focus, *** ***** *****-********* features *** ********* **************.

** ****, *** **** power **** ** *** occurred **** ****** ***** specs, ** ~*,***' ********, using * ***** **** cable ******* * ****** spool ** ***** **-** and *** ***, *** even **** **** **** IR *** ****** ** and *** ****** *** zoomed (***** *****).

PoC *** **. ** ***

** *** *****, *** power **** **** ***** quality *** **** ******* to ********** *** ** models, **** ******* *******. Very ****** *********** ** text ******* *** ** seen, *** ******* ******* are *******. **** ** notably ********* ******* *** ******, ****** recently, ***** ******** ******* worse ******* **** **.

Dahua *** *** *** ********

***** *** ********* ***** over **** *** *******, but **** **** *** released ** ** *** time ** **** ****. They *** *** ********* listed ** ************* ***** [link ** ****** *********], but *** *** ** North *******. *******,***** ** ******** ** to **** *********** *** ***, ******** to *********'* ****. ** plan ** **** ***** PoC ******* ********* ** soon ** ** ** available.

Version ****

*** ********* ******** *** hardware ******** **** **** in **** ****:

  • **-********-***** ******: **.**.** ********
  • **-*******-**/*: **.*.***************

Comments (10)

We have tested Dahua’s POC and have found that there are limitations of camera type combinations, so out of each group of 4 basic cameras, only one can be with an AF motorized lens or have IR illumination specified for more than 30 meters. Also, at the time (4 months ago) only 2MP was supported.

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This is huge. Power over coax like this will make upgrading these old systems easier. A lot of times we go in where there are a ton of 24v cameras with a 24v power supply. Most of the cameras now are 12vdc and require a different power supply. So we either need to add a second power supply or we have to upgrade all of the cameras and the power supply. Makes getting in the door harder. With this technology, we should be able to leave a few old cameras with the old power supply and just flip on power over coax for the new cameras. 

Hopefully, everyone else gets on board and starts making cameras and encoders with this technology. I have no interest in selling DVRs so having encoders work with this will be huge. 

 

Agree: 2
Disagree: 1
Informative: 1
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I see this reducing cost in a new analog installation, but I don't see this how this is huge for retrofit? There are plenty of 12VDC\24VAC HD-over-coax cameras available. There are also a handful of manufacturers that have low-cost HD-over-coax encoders that are ONVIF or native drivers in major VMSs.

I don't see this technology being adopted or developed on a mass scale since almost everyone does IP for new installs. The savings generated by not needing a power supply or 18/2 is negated since the DVR and cameras are more expensive, so it isn't even effective in price-prioritized SMB market. the majority of dealers who use these brands and HD-over-coax technology typically aren't buying Belden cable or Altronix power supplies, but much cheaper overseas alternatives (copper-clad, non-UL listed), so savings wouldn't be very much, creating a hefty net increase in material cost.

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We have just installed either 24VAC CVI/TVI cameras or use 24VAC -> 12VDC step down converters. 24VAC is still better for longer runs than 12VDC. After multiple scenarios and headaches with horribly installed coax and various other scenarios using HD over coax trying to save customers money, I would rather run new CAT cable that I install properly and use IP cameras and be done with it.

The idea of the conversion is often better than the reality. This can be even worse with poor quality coax and using EoC devices.

I swear I want to find half the hacks who install this coax without a care in the world in regards to the manner in which it's installed. Every time I see a twist on BNC, I want to scream...and then I pull lightly, it falls off, and I laugh. Although the electrical tape is always a nice touch to a poor termination. Need to cover that copper braid (or aluminum depending on the installer), lol, as if the BNC shell isn't bonded to the braid.

All this being said, if the cable is verified to be installed properly with quality cable and terminations, I don't have a problem attempting to use it as some really long and difficult runs can save money by using existing premise cable. However, this just isn't always the case.

Agree: 3
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I can relate. I began my telecom career at a cable company and we were taught the proper way to terminate coax, and used only Corning Gilbert UltraRange compression connectors. When I jumped ship to the competitor a few years later they used Belden (formerly T&B) Snap-n-Seals which were also very good.

One of the biggest problems we saw in the field was customers trying to do their own coax networking, which invariably involved either the crappiest twist-on connectors or crimp-ons secured with a pair of pliers. Braid frequently touching the stinger and the customer wondered why their TV looked terrible (this was still in the days of heavy analog TV). My favorite was the customer that bought compression connectors and then tried to crimp them on.

Agree: 1
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Does it work with Cat 5 cable and baluns?

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PoC may be monitored and controlled via the DVR's local interface, but it is not available in its web interface. 

 

From past experience, this is not surprising. One of my biggest annoyances with Hik was inconsistencies across interfaces (Web, Local and IVMS). One would think with all those engineers they supposedly have, they could be more consistent. I suspect Hik is not the only manufacturer to employ this sloppy practice, I encountered similar annoyances with the big American companies as well. Integrators and end users turn out to be proxy beta testers and scoffed at when pointing out deficiencies with manufacturers tech support. Another reason I find value in venues like IPVM.

Agree: 1
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Funny

Is a POC system that different than using integrated EoCs? I wonder if that is essentially why the price and performance is close to IP.

Agree
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Great report. Question on the coax used, was the RG6 aluminum or copper braid? Solid copper conductor or copper-coated steel?

I'm wondering if RF-specific coax can be used with reasonable efficacy in CCTV installations.

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In our tests, the cable was mainly RG-59 with a copper braid and solid copper conductor. I briefly tested with some copper-coated steel, and we also tried the really low grade micro-coax that comes with a lot of Costco kits.

For short distances, ~100' and under, I honestly think the choice of cable is pretty flexible. When you get into longer runs, especially 500'+, you'll want to follow manufacturer recommendations.

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