What Killed My CCTV System? Guess Right And Win

I received a call from a customer to say their CCTV system had stopped working, on a very stormy night with strong winds and heavy rainfall, and could I fix it? The problem is now solved but I thought I'd pose the scenario here as a bit of fun to see what others think might have happened. I'll post the solution in a couple of days.

The customer has an 8-channel Dahua HD-CVI DVR connected to 8x HD-CVI 1080p cameras. The power to the DVR, to the attached Samsung monitor and to the 8 cameras is protected by a UPS which provides 20+ minutes of battery power. An ethernet cable connects from the DVR to an ADSL router/modem which is not protected by the UPS.

The customer reported that his monitor was black and he couldn't see any camera feeds on screen. I attempted to remotely access the DVR and found I was able to connect but all the cameras showed black. This meant the DVR was still alive which was good news. I found the DVR was recording black video. Next I went back to the last occasion on which the DVR had recordings from the cameras. Every camera showed similar symptoms. Here is the view from camera 8.

The first second or two show the normal night time IR image. Then the picture starts to break up. What struck me as particularly odd is that parts of the corrupted image cycled through scenes from several of the other cameras, and not just from camera 8. How and why would that happen, I wondered? After a few seconds, the image went black and stayed that way. The same symptoms could be seen on all 8 cameras.

Question: What was the cause of the black video problem and what is the solution? Sorry I don't have any IPVM lanyards to give away as prizes!

I'll post the solution in a couple of days but know there are some members who love troubleshooting and might have a little fun working out the problem and solution. Feel free to ask questions if more information is required.

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****, ****** *** *******! ***** ****!

**'** ****** *** * ***** *** **** *********** *** *** first (***-******* :) ****** ** ***** ****.

***** *** ****!

** **********, * ****** **** ********* *** ***** ** ******** with, "** *** * **** *** ****** ***** ...."

***** *** ** ******* ** *** *** **** ******* ** this *********. *'** **** *** ********** ** *** ********* *** a ****** ** **** *** **** ******* ** **** ********* work.

**** ** *** ******** *** *******?

*** *** *** **** *** ****** **** ****** ********* ** the ***** *** **** *** ***** **** ***

*** ***** *** ***** ***** *** **** ******* *** ********* and ****** ********* - *****.

*** *** ****** ******** ******** - ***** ****** ** **** - *****.

***** **** ***** ** *** **** ****** - **** ****** good - *****.

*** ******* ****** *** **** ******** ** *** **** **** - *** ****** **** *** ****** ** *** ******* ** the **** **** *** ***** *** ***** ***** **** (******** that ***** *** **** *** ** *** **** ****).

******** **** *** ****** **** ** *** **** ****. ********** cameras ***** ***** ******** * ****** ***** ***** **** ** a ****. *** ***** ** ****, **** *** **** ******** would ******** **** ***** ****** ******** **** * **** ** tripped ** ******** *******, ********* ** **** **** ** **. Power ** ****** ** *** ** **** *******.

-My ***. *****: since all BNC ports on the DVR's side combine and end in one single daughterboard circuitry, a surge in voltage running through the wire from any camera to DVR (storm and heavy rainfall; lightning strike will find it's shortest way to ground through any piece of metal in the ceilling or conductor wires that are in it's path) simply messed up with the channels and it just "went completely crazy" and that "crazyness" showed on-screen in the monitor. Signals meant for channel 1 showed up in channel 8 and viceversa. And then the first or even a second voltage spike fried either the camera or the daughterboard.

- *** ****'* *** ** ******* ***** ***-**-***, ** ******** Cat.5/6 ****** **** ***** ****** **** **** ** **** ****. If ** ** ******** ******* ***** **** ***** ******, ******** yourself "*******" ** *** ***** ****** ********** ********** ($** ******* or **** * ****, *** **** ******* ** ******* **** any *** ** ******) ** ****** *** ***** ****** ********** and ********** *** **** ********* ********** ** ****** **'* *** (meaning *** *****´*) ******** *********.

- *** ****** **** **** *** ***** *** ******** ***** to ** ** ****** *****. ** *** ******'* ******* *** drilled ******** ** *** **** ****** *** *****, *** ****'* material ********* **** ****** ******* *********** **** **** ****** ** none ** ***. *** ****'* *** ** *** ****** ** installed ******** ** **** * ***** ****. ** **** ** the ****, **** ** ***** ** *** ******* ***** **** the **** ** * **** ** *** ******; *** ********* to *** ***.

-My ***. *****: the customer simply did "something", which could be anything you can imagine. (In my years of experience in the field, many cases involve finally the *** **************). **** ******* ** ******* ** ************ ********* **** **** not ******** **, *** **** **** ****** ** *** ****** undo **, **** **** *** ** *** "** **** ******** and *** ** ** **** ****" : (.

*.*. ** *** ***; *'** **** **** **** **** **% of ********* **** *** ********** **** ****** ****** * *** battery **** ***** *** ***** ***** ****** (** **** ** a ***** ****** ********) *** ***** ********** (** **** ** a ***** ******* *****) ********. *** ***** (****** ******* ** the ***** ********* *** **** ************* *** *****, ****** ******* we *********** ********* ****** *****-** * *** ** *** ******* for **** ******* ******* ******* *******) **** ******** **** **** give **** * ***** ** ***** ********** / ****** ***** of ****, ******* ** *** *** *****'* *** *** *** voltage ***** *** **** ********** *** **** ************* ***% ** the ****, ** ***** ******, ** ****** **'* ********** ****, then *** *** ** ****** ** ********* * ******* ***** strip ********* * ****** ******* ** ***** *****.

** *, ***** *** *** ****** * **. ** ****** to **** *********:

*. ***, ******* ******* *** **** ** *** *******.

*. *** ****** *** *** ******** ** **** * ***** beam.

*. *** ******** *** *** ****** **** *** ********* ** the **** ** *** *******. *** *** ***** ** **** off-camera *** * ***** **** **** *** ******** ** *** video ** **** *** ****** **** ** *** ***.

****'* *********** *********** ***** ***** ****** ******* **** * ***. In **** ********'* ****, *** ***** ***** ** ********** **** semi-regular ********* *** ***** ******. ** ***, *** *** *** done * ***** *** ** ********* *** *** ***** ******** his **** ******.

*** *** **** **** ** *** **** ***** ***** **** from :** ******* *** *** ******* ***** ** **** '*' to :** ******* *** **** '*' *** **** ********** ** oscillate ******* ******* *** ******** **** ******. ***** ** ****** these *** ******* ***'* **** **** ************ *** ****** **** one **** ** **** ** *** ***, **** ****-********* ************ seems **********.

******* *** **** ******* ******* ***** **** ********* *********** ***** like '*** **** ***** *** ***** ********* ** *** ***' are ***. ********* **** **** *** **** **** ** ***** well **** ********** *** * ********** ****** ** **** ****** anything *** ********, ** ****** **** *** ******, ********* **** theNTP ********** *** ******** ******* *** ************ ** *** ********** ** *** ******** *** ****. Perhaps in the waning moments of power, the video ********* ******* ****** *** ******** causing the cameras to re-order themselves in their dying gasps?

******** * **** ** ****.... :)

**** *** ******** ** *** ***** *** ******** **** ******** is, *.*. **** **** *********** ******* ***% *** *** ***** behavior, ******* ****?Could *** ********* **** ******* ** ****?

*** *** **** ******* ******'* **** ****** ***** *****? **** when *** *** *** ******* ******* *** ***** *** *** views **** *****, ** *** **** *** ******* *** ***? Do ***** ******* **** ***** *** **** *** ****** ***** own ********? * ***** ***** ***, *** *** *****?

** *,

***** *** *** **** ******** *****!

**** ** ******* **** ****** *** ******* **** *****.

"** ********" ****** *** *** ********'* **** ****** **** ** and ******* *** *****'* ******* *** *** ***** ***** ***** to *** ******* ***** *****. ****'* *** * **** ***** the ******** ***** **** *** *** ***** ** *** ******* rather **** *** *** ***** ******** *** ****. ** *** customer ** ****** **** **, * ***'* **** ** * could ********* *** ******* ** **** ** * ***** **** to ** ****** ** ******* **** **** ********.

**** ******** ***** *** ******* ******* ** * **** ***. When *** ******** **** *** ******* **** *****, **** ****'* quite *****. ***** *** ***** *** ***** **** ** ****** of ***** *** ******* ****** ****** ** ****** ***** **** the ******** ********* *** ****** **** *** *** **** *****. However *** ***** *** **** *****. *** ******* ** *** keep ***** *** ****. *** **** ** ******** ** *** DVR *** *** *** ******** *** ********.

***** *** *** **** ******* *********!

******.

* ***'* **** *** *'* ****** ** ******** *****.

*** *** ***** ** ******* ***?

*** *** *** ******* **** *** ** **** **** *** power ****** ********. (******* ** ******* ***** **** ********)

** *, ***, *** ******** ** ***** ** *******/******* ***.

**** ***** *** ****** ******* ********* ** ****(**** ****** ** not ****** **** *** ******), ********* *** ********* *** **** was ******** *** ******* ** **** ********. *** ****** *** are ****** ******** ******* ** "***" ******* ** **** *** video ***** ** *** ********* *** **** ** ******* ******** - ** **** ******** *********** ******** **** *** ***** ***** decoders **** *** ***** ****(*). *** *** **** ** ************** losing ***************. ** *** **'** ******** *** ******* ** *** HDCVI ******* *****. ** ****** **** **** **** ** "**** about", ** ********* **** *** *** ******* **** ****** *** the ******* ***** ** **** ***** *****.

*** ****** ******* ** *** *** (*** ***** ******* ***** ends, ***** ******* ** *** *******) ****** **** * ****** ground ********** *** *** *** ******* (*** **** ****** **** some ***/********* ****** ********** ******). ************, *** ****** ******* ** the ***** ******** **** **** * ****** ***** *** ****** plane **** ** ********* **** *** ******* *****/****** ****** **** the ********** *** **** ****.

** ** *********** ** ****** *) ********* ****** ****** ** the ****** ****** ******* *******/*** ** *) ***** ***** ******** only *** ****** *****/*** ******* ** *** ***, ******* *** HDCVI ***** ******** ** **** *******.

****** ***, *** *** ***** ** * ****** ****** ** the *** *** ******* (******** ******* *** *******). **, *******, the ****** *****/*** ******* ** *** *** *** *******, *** probably ******** *** ***?

** ** ********** **** *** ***** ******* *** *******, *** I ***'* ***** **.

******, **** ****** ** *** ********, ** ** ******* ** assume **** ***** ** **** *** ****** *****? *** **** on **** ******, **** *** ***? ** **, **** **** a ******* ******* ***, *** ***** *** ******* **** **** around, **** *** *****?

**** *** ******* *** ****** # ***** ** ****** *, indicating **** *** ********* ******** ****** **** ******* *** ********* but ***** *** **** *******, **?

** ******,

***** *** *** **** *******. ****'* **** *********** *********** ***** the ***** ***** *** * ******* ********** **.

* *** ******** ****** *** ****** *** *** ******* ******** black.

****** ********* ***** **** ** * **** ***** ** *** DVR ****. ****** *** *****-*** *** ****** *** ******, *** won't ***** *** ***** ***** ****** *****, *** **** ***** remain *********.

******* ** **** **** *** **** ******* ***, *** *** you ***** **.

**'* ***** ******** **** *** ******* ********** *** *** *******, only *** *** ******, *****?

****** * ** ******** **** ***** *** *'* ********* ****** guess ** ******* **** ****** *** *** ****.

***, ** *** ********, *** **** ** *** ******** ******* when *** '*****' ****** ***** ***** **** ****, ********* ***** is ** **** ** * ******* **********, **** ** **** back **** *** ***** ******** ****. **** **** *** ***** continues **** *** ***** */* ** *** *****, ***** **** seperate '*****' ********* *** *** ****. **'* **** ** ***** at **** *****, *** **** ** ***** ** ** ****** see.

**** ***** ******! **** ****** ********* ****'* ****, * *** ask *** ******** ** ***** *** ********** *** **** ***** on ***** *** *** ******* ********. **** ***, **'* ******* how ***** **** **** ***** ******** :-)

*** *** **** **** **** **** *** *****. ** **** place *** **** ********* ** *** ******** ** ** ** turned **. ** *** ** ****** *** ** **** ****** is ********* *** *** ********* - *** ***** ******** *****'* have **** ******** ** ***** ****** ****** ***, ** *** set ** *** *** ** ******* *** ****** ****** *** the *********.

**** **** * *** *** ** *** *****, *** ******* is *** **** *** ******, ** ** ********* ** *** DVR ****. * *** *** ********* ****** **** ****** ** dark (****** *****-********) ****** ** *** **********, *** * ***'* see *** ****** ********* **** ****** - ** ****** ******* from **:**:** ** **:**:**, **** ***** **** ****** ** ** (could ** *** ******* ***** ** ** *** ** *** uploaded).

*** ***** "*** *" ** **** ******** ********* ** *** DVR **** - ******** **** ***** *******. **** ***** ********** regardless ** **** ***** ** *****, ******* ** *** ***** is ******* ***** ** ***** ** *** *** **** ******** the *********. *** ********* ********* ******* ***** *** ***** ** captured, *** ****** ** ** ********** ***** *.***.

** * ***** ***** ********* ** ***** ** *** ***** decoder ***** *** ***** ****/********** **** *** *** **** ** the *******.

** ******, * ***** ** *****...

*** ****, *** *** ******* ** **** ******'* *** *'* lightning ****** ** *** ***** ** *** *********, ** **** as ******'* **** **** ** *** ********?

**** **** **** **** *********, *** ** **** **** ***** out **** **** ***** ******* * *** ***** ** ****** speculative *** ****** ************ *********. ;)

** *, * **** **** ************ ******!

**** ******* *** ****** *** *** *** ******* *** *******. I ** *** ******* ********* *** * ******. *** ******** was ****** ** * ****** ******* **** ** ***. ******* I ******** ***** ********** ** *** ******* ******* *** *** 20 ******* ***** ** *** ****** ******** *** ***** *** see *** ************ ****** ** *********. ***** *** **** ********** rain *** **** *****.

*** ******** ******** *** ** ** *******

(*) ** ******* **** *** ***** ****** *** ******* *** DVR *** *********. **** *** ***** ****** *** ****** *** DVR *** *** ***** ****** *** ******* ***** **** *** disrupted

(*) *** ******** ** *** ****** *** ** *** ** short ******* *** *** **** *********** ******* ******** ** *** and *********** ** *** *******.

(*) ******* ******** ***** *** ** *** ** ********** ****** the ***** ****** *** *******.

** ******* ***** * **** *** ***** *** ** ******* may ** *** ** ******** ********** ** ***** ******.

**** ********

** ***** ** **** *** ***** **** ***, *** ****** then ****** **** *** ****. *** *** ******* **** **** low ********** *** *******. ******* ****** *** ***** (** **** more *****). **** *** ******* *** ***** ******* ***** (**** displaying *** ******* *** ***** *** ***** ******* **** **** battery ***** *** *** *** ** **** ** (***** *** using ****** ******* ** ********** *** ******). **** ******** *** DVR *** ******** *** ***** ******* *** ******* **** (****** modem *** ** ******* ******* **** ****** ***** *** ** was ******* ******** *** ***? ** *** *** ****** ** POE?) ********: *** ******* ***** ******* ** ***** ** **** till ***** ******* ****** *** ** ***). ** ***** ** the ***** ***** *** ** ******* ******* ** ** *** house (** ********* **** *** ** ** ***** **** * could *** ******).

* ****** **** * **** **** *** ** ** * thought.

**, *'* ***** ** ***

  1. ***** ******
  2. *** ***** ** *** ** *** ** ******* ****** ***** as *** *****
  3. ******* ** *****
  4. ***** ***** **** ** **** * *****, ******* ***
  5. *** ***** **** ******* *** ***** **** ***, *** ******* can't ****/*******
  6. Solution: ********** ***, *** ***** ******** ** *******...

** ***** ** *** ***** ****. ** ********** **** ** used ***'* *** ******** * ***** ** *** "****** *****", (Camera * ******* ** ** ******** **** ******* ****** *) it ****** ****** *** ** ** * ***** **** *****. The *** ******** ***** * **** **** ******** **** *** card ****'* ****** ******** ** *** ***** ** ****. **** happened ** *** ***** *** **** ***** *** ****** ** shipping.

** ****'* *** *** **** ** ****** ***** ***** ** some ******* ***** ***** **** **** ***** *******.

* ** ***** ** **** *** * ***** ** *** monitor ** ********** *****. * **** *********** **** ****** *** replacing *** ** *** ***** ****** *** *******. ************* *** monitor **** *** ******** ******** ****** ****** ** ***** ****** display.

* **** **** **** *** ******** ****** **** * ***** and ******* ******* ******** *** *** ******** *** ** ** replaced.

** ***** ***** ** ***** ******* **** * ****** ********** and ******** *** ***** ** * ***** ***** - ****** meant ************* ****** *** ** * **** ***** ******* ***** lifted.

*******, ***** *** ** ******** *** ****** ** ** **** whodunnit. ** *** **** *********** ** **** ** **** ********* approaches ** ******* *** **** *******. **** ** *** ********* were ***** ******** *** * *** ** ******* **** **** them. ***** * ****** **** **** ** * *** *********, I've **** ****** * *** **** *** **** ************ ************, especially ***** *** ***** ******** ** * *** ** ******* why *** ***** **** ** *****.

*** *** ****** ****** *****! **** ***** ****’* ****** ** * ******.

What *** *** ***** ** *** *******?

*** ******* **** *** ******** ***** ** * ****** **/** power ******* ***** *** ********* ** * ***. *** **/** power ******* **** **** **** * *** ******* ** ******* so *** *** ******* ******* *******. *** ***** *** ** the ***** ******* *** ** ****** *** ** **** **** it ****** ** ******* *** *****.
*** *** *** *** *** ***** ****** ** ** **** working *** ****** ******** ***** *****.
*** ******* *** *** *** ***** ****** *** *** ******* despite *** ******** ****** **** ** *** **** ***** *** wasn’t *******.

What *** *** ********?

*** ******** *** ****** ** ******* *** *********** **/** ***** adapter.

**’* ********* ** *** *** *** ***** ******* ****. ** cannot **** ****** **** *** ***********, *** ********** ***** ***** to *** *******, ********** ******* **** **** ** *****. ***** is * ***** *** ** *** ***** ******* *** ** switched *** **** ****** ***** *********** **** ********* **** *** wrong ********. **’* ******** **** ********* *** **** ** *** power ******* ******** * *** **** ******* ***** *** ****** on *** ******* ** *** ****! ** *** **** **** LED ***** ****** ******* **** *** ***** ******* *** ****.

The ******

*** **** ******* ******** ***** ****** ** ******** *** ******* ** *** ***** supply ** *** ******* ** *** ****** ***** ** *** problem *** ****’* ********* **** *** ******* ** *** ***** and **********. ** ********** *** ********** ****** ** *** **** system, *** ************** ********** *** **** ** ***** **** ***** a ***** ** *** *******. ** ******** **** **** ** one ****** ********* *** ** *** *****. *************** ****!

Challenges ** ******* *** *******

** ********** *** ******* *** ******** *** ****** ****** *** there **** * *** ********** ** ******* *** ********** *** problem.

  • *** ******** **** *** ****** **** ** ** * ***** not **** **** **, ***** *** *** ********* *** **** the ******* ******.
  • *** ******** *** ***-********* ** ** *************** ********* ****** ** be *************** **** ** ******.
  • *** ******** *** *** ***** *** **** ********. * ******* the ********* ** *** ******* ***** ***** *** *** **** been ** ******** ***********. ***** * ****** **** **** ** what ********* **** **, * **** *** ** **** **** to ****** *** *********** **** **** ** ******* ******* *******! In **** ****, * *** **** ** *** ***** ***** to *** *** *** ********* ******* ** *** ******** ******* but *** ****** ***** **** *****.
  • ** *** ******* ** ********* *** ******** ** ********* *** CCTV ****** ** *** ******** *** ****** ** *** ****. I ******* *** ****** ********** *** *** ** ******* ****** the ****** ******** *** ***** ** ******** ** ************ ** lightning ** * ***** ** *** ** * ******** *****.
  • * **** ******** ******* ***** *** **** * ******* ***** outage *** ** *** ******** *** **** ******, ** ****** was *******. ** ****** ****** ******* ** * ******** ** the ********’* ****, * *** **** ** ****** *** ***** interface ** *** ********’* **** ******/***** *** ***** **’* “** time”. *** ***** ********* ****** *** ***** *** **** ********* since **** ****** *** ****** ******** ***** *** *** ***** connected. ***** *** **** ******/***** *** **** ******* *** ***** time **** ****** ** *** *** ********* ** *** ***, I ***** *** * ***** ****** ** ***** ***** ** a ******** *****.

** ****** *** **** ***** *********, ** ******* ****** ****** that *** ***** *** ******* ** ******** ******** *** *** caused ** ******* **********. ****** *** ******** ** ***** *** green *** ** *** *******’ ***** ****** ******* ********* *** simple ***** ** *** *******.

* *** * **** *** ** ******* ********* ******** **** they ****** *** * **** ***’** ***** **** *** ***!

***, ***** ******* ** *** ***** ******. ***** *** **** this?

******** ****! ****** ****!

** *, ***, ******* **** ****. ****'* * **** *******. Thanks *** ******* **!

*** ***** ******* *** ****** ** ***** ***** ****** **** the ******* ******** ** * ****'* ********* ***** *********** **. I *** ********** ***** *** ***** ******** **** * ******* on **** ******. ** *** **** ***** *** **** **** some **********. ***** *** ***-********* ****** ** *** ********, * figured ** *** ****** ** ******* * ******* ****** *** leave * ***** ***** ******* ** **** ** *** ******, especially ***** *** ******** *** *** ******* **** ******** ** the ***********. ********** (*** *** **********) ***** ********* ** ******* was * ****** ****** *** *** **** ****** *** **** online **** *******. * ***** ******* *** **** ********* **** in **** **** ****** **** ****** *****.

*****, *** ***** *****.

***** *** ******* **** ** *** *** **** ******** *******.

***** *** ******* **** ** *** *** **** ******** *******.

**** '******* ****' ** *** ******? ;)

*****'* ****, ** *** * *** ********. ** ** ******, I *** *** ****** **** *** ***** **** *** * video. * ******* ** *** **** * *******. **** * watched ** * ***** ** **** * *** ****** *** decided *** ** *** ********** ******* ****** ** ****. ** my ******, * **** **** *** ****. ** *** * good *** ********.

****** ********!

****, ***************! ****, ****** *** ***** **** - ** *** fun!

**'** ********* *** **** ** *** ** ******'* ********** ***** and *'** ******* *** **** ************ ** *** **** ***** bonus ** *** **** *** *** ** ***!

** ****, ***** *** *** **** ***********. **** ***** * lot ** **.

** **** ** *** ******* **************, * ***** **** ***** me *** ************.

** ****, ****'* ********* *** *'* **** ******** **** **** forward ** **** ********* *********! ********* **** ** **** *** start.

* *** **** ******* ********* ** **** ** **** ******** security * **** *** *****. ***** ** **** ****** *** there. ******** ** ** *******! **** "****-*********" ** * **** idea ****.

**** ** *** ***** ****** ****** ?

*** **** ******* ** ******* **** ** ******* *** *****?

** ********, ****'* * **** ********! *** ***** ****** *** rated * **** ***** *** **** **** ****** *** *** 8 ******* ** ******* ***** *****. *** ******* ******** *** and *****.

********, ** *** **** ***** ******* **** ******** *******. ***** the ****** ** *** ****** *******, ** *** ******* *** night. ***** ***** ***** **** *** **** ***** ****** ********** normally.

** ****, * ***** ******** *** ****** ***** *** ***** CCTV **** ********* ** **** **** *** *** **** *** and ************-********* #*:-)

  • *** *** *** ***** ****** **** **** * ***** *** test *****
    ** *** **** ***** *** * *** ** * *** test
    **** ** ******* ** ***** *** ****** **** *** ***** .

** ********, ***** *** *** ****** *** **** ******** ***** supplies, *** ******** *** *** **** ******* **** *** * year ** * **** ** ****** ** ******* * **** powerful **** ** *********. ** **** *** * *** ************, then * ***** **** ****** ** * **** ******** ***** supply ****** ** ****. ******* *** ****** **** ** *** power ****** *** **** ****** *** ************** ** *** ***** supply.

**** ***** ***** *** ******* **** ****? ******* ** **** that * *** *** *.* *, ***** ** *** ***** at ********** ******* ** ***** ********. ;)

* ***** ******* *** **** ********* **** ** **** **** should **** ****** *****.

****** ***, *** *** *** **** *** '*****' *** *** production *** ********, **** * ******* ** ****, ** **** a **** ***, ** ** *****?

**** ***** ***** *** ******* **** ****?

** *, *** ***** ** *** ***** ****** ******* *** 12V **, **, ***.

*** ** *** ******* **** ***** ***-******** ***** **** **** a ******* ** *.**.

*** ** *** ******* *** ***** ***-******** ***** ***** * maximum ** **.

*** ** *** ******* *** ***** ***-******** ***** ***** * maximum ** **.

********* *** ***** ******* ******** ***** ** ***. *** ***** adapter *** ******* ****** **% **** ***** **** *** **** demanding ******** ******** ** *** ***** *******.

*** *** *** **** *** '*****' *** *** ********** *** together, **** * ******* ** ****, ** **** * **** off, ** ** *****?

*** ***** **** **** * ****** ******* *** *** ********** power ******** *** **** ****** ** **** *** ******* ** any *** ***** ******* ***** **** ****** *** ******. ** the ***** *** ******* ********, **** ** **** * ***** do. ******* * ********** *** ********* ** ******** ** *** a ****** ***** ******* *** *** * *******:

  1. *** ******** ** ******* *** *** *********** ********.
  2. *** ******** ** ****** **** ** ** * ***'* **** go ** **** *** *** *** *******.
  3. *** ******** **** *** ***** *** **** ******** ** ** which ***** *** *************** ****** *** ** ** ******* * translater ***** *** ***** ******* *** ******* ** ** **** in ***********.
  4. *** ***** ******* *** ***** **** ** ****** ** **** was ****** ***** * ***** **** ********. ***** *** ** need ** **** *** **** ***.

*** ***** *******, * ***** ** **** *** ***** ** simple ** ********. *** ******** **** *** ** **** *** swap *** *** ***** ******* ****** **** ****** *** ** more ***** ******** ** **** *******. ******* *** *** ******** source ** *** ******* **** **** ** *******. *** **** to *** *** ******* **** ****** *** ****** ** **** due ** ****** ** **** *** ******** ******* *** ******** via * **********. * *** ***** ***** ** **** **** 1 **** ** *** * ****** *********** **** ************ *** deal **** * ******** *******.

** *** ***, **** ******** ***** **** ******** ** ********* the **-*** ****** ***** **** **** *** ***** ********, ***** you *** *** *-**** *** ******** ** ***** * ** cameras ** ***** *** **** *** * ****** *-**** *** switch?

** *** ***, **** ******** ***** **** ******** ** ********* the **-*** ****** ***** **** **** *** ***** ********, ***** you *** *** *-**** *** ******** ** ***** * ** cameras ** ***** *** **** *** * ****** *-**** *** switch?

****, * ******'* **** **** ******** ****** **** *** **** you **** ***** ** **** *** ***** ****** ***** **-****, a ******* *** *** * *****, *** *** *** *** posted *** ****** ****** *** ***** ***** ***** ***, ** its **** ******* ** ******** ***** ****, **** ** ***** the *** ***** **** ** ***.

***** ** * *** * ***** ****** **** *** ******* at '******' **% ********, *** * *** ******* ** * box ** *** ****, * ***** ********* ******** ******* ******* them **** ** **% ** ****** ***** ****. ****, ** one **** *** ***** ***** **** * ******* **** ***** continue ** ********, ******* ** *** ***** ****** ***** **** until *** **** ******* *** ******** *** **** ***.

** *** **** ** ****-*** *****, ******* ** ******** *** an *** ****, *** **** ***** **** ******** *** * from *** *** ** *** ***** ***** ******* *** * replacement.

** ****** **** **** ***** ** ** *** **** **** (lightning, *****), *** **** *** ***** ****** ** **** ***** failures ** **** (*** *****, ***) **** ***** ******* *** system **** *********** ** ***. *'* *** ****** *** ********* the *** ** **, *** *** ***** ******* ***** *****?

*** ***** ***** ***** *** ***** ****,how **** *** ***** ***** *** ****? And what gauge wire are you running them on?

****** *** ****** ** ***** **** **** ********* *********!

*** *** *** ****** *** ****** ****** *** ***** ***** usage ***

* *** ******* **** ******** ***** **** ****** ***** *** challenge *** ****. ******* ** *** **** **** *** * days ** ***** ** ****'* **** **** ****** ** ***** this ***** ** ***********.

***** ** * *** * ***** ****** **** *** ******* at '******' **% ******** ...

*** ******* *** *** ********** ******* ** **% ** *** power *******'* ********. **** **% ****** ** ***** **** ** the **** ********* **********. *** ***** ******* **** ***** ** so **** **** ***** ** ****** ********* **** ********* *****. Secondly **** *** **** ******* ** ****. **% ** * safe ******* **** *** *** ******* ** **'* ***** ** be ************* **** **** **** ****** *** *'* ****** **** an ****** ***** ******* ** * ***** ** ** *** to ******* *** ****. *** ********** ** *** ****** *** a *** *********** ***** ********** *** **** *** **** ** the ***** ******* *** **** ********. *** * ********* **** of ********, * ***** **** **** ****** ** ********* ** with *** *** ***** ******** ** *** **** *********. *** yes * ** **** *** ****** ** ******* ** ** most ********** ***** ******* ***** *** ******** *******. ***** *** for ******* ***** *****!

*** **** *** ***** ***** *** ****? *** **** ***** wire *** *** ******* **** **?

* **** * ****! *** ***** *** **** ******** **** coaxial *** ***** *******. ***** *** ********** ** *** *****, the ****** ***** *** **** **** *** ****** **** *** feet. *** ******* *** ************ *** *** ***********'* *********** ** cables *** * ***** ****** ** ******* ** **. *** fact **** *** ***** ****** *** **** ******* ** ******** is * ********* ** *** ****** ****** ** **-*** **********. I ******** **** **** ***** ******** **-*** *** ********* ** worked ********* **** **** ****** ********** ******, * *** ********* as * **** **** ****** **** ** * ******** ******** for ***** ***** * *** *** **** *** ****** ** installing *** ****** ******.

****** *** ****** ** ***** **** **** ********* *********!

"*********: ********** ** * *******, ****** ***, *** **** **** harmful *******." * *** ******** **** *** *** ** ***** I *** ** ********** *********** ;-) ***** *** *** ******* * *** ** ******* into **** ********* *** ****** **** ** *** ********* **** hadn't **** ***** ******.

****, ************* ** ** *** ****** ** ****** *** ** the ***** ************ ** *** *** ******* *** *** * supply ***** ** **** *****.You **** ** **** **** ************* *** ***** ********** ** *** ***** ****** ********** *** ** ***** **********, as well as the effects of the resultant voltage drop on the equipment.

**** ****** ** **** ******* ** ******** ******, ***** *** ones ***:

  1. *** ****** ** *** ***** (******=**** ****),
  2. *** *****-********* **** ** *** ********** (*******=**** ****),
  3. *** ******* ****** *** **** (*****=**** ****)

***** ** **** ** ****, * ***** *** ***** ***** be *********** **** ** ************.

***, *** ** *** *** **** ****, **** ** *** it's ********* **** ** ****. ** **** ********, (****** **** not ******), **** ***********'* ******* *********. **** *** ******* *** 12-24 ****-*******, *** *****? *'* ****** *** ********* *** **** on **** *** ******* ***, ******* ******* *** ******* *** the *****, *** ***absolutely ***** ** ******* *** ***** ****** ** *** ****, And it did die, right?

**'* ******** **** **** *** ******* ********* ** ******** **** but *** ** *** ******* * ***. *** ***** *** notice ****. ** **** *** **** *** **** **** ** measure *** ****, ********** **** ****** ************, ****** *** *** get * ***** ******** ** ********* *** ** ***** ***** using * ******** ****-*-**** ******, **** *** ***** **** **** client.

***** *** **** ******* **** *********** ** *** *** *** can *** ** ******** ** ****. * **** * **** brick **** * *** **** ****** **** *** * **** report ****.

************* ** ** *** ****** ** ****** *** ** *** power ************ ** *** *** ******* *** *** * ****** based ** **** ***** ... ***** ** **** ** ****, I ***** *** ***** ***** ** *********** **** ** ************.

** *, **** ** * **** ***** *** ***** ********** have ******* *** ****** ****** *** **** *********. ***** **** is * ***** *** ** *** ***** *** ***, *** did *** **** **** ******* *******, * ******* *** ****** themselves **** ** ********** ******* **** ** *** *********** ** display *** ** *******. * ***'* ***** **** ****** *** but * ***** **** ***** **** **** ** *** ***** life ** *** ***** *******. *** ************* **** *** ******* only ********* **** **** ****** *** **. *** ***** ******* really *** **** *** ******'* **** ***** * ****** ****** during *** *** ****.

*'** **** *** **** **** ** ***** ******* ********* *** they *** ***** ******* ****. ** ******, ***** ************ ** different ** **'* **** ** ******* **** **** ****. * believe *** ***** ******* ** ** * **** *** *** some ******** *** ** ********. **** ***** ** ** ** a *** **** ** **** *****.

* *** ***** ** ******* * * ****** ******** *** this **** **** * ******* ******* *** * ****** ******. Therefore * ***** ** *-******* ***. * *** **** ***** information ** ** ** ** * **** ******* ***** ** cameras **** ** ********* ** *******. **** *** ********* ****** and **** *** **** ******** **. * *** ** ***** the ***, ** *******, * ***, **" *******, ***** *******, power **********, ***** *** **** ******* **** **** ** ********* was *** ******* ********* ** *** ***********. ******* *** **** equipment ******* ******* *** ***********!

**** *** ******** ***** *** **** * *** ** *******, he **** ****'* **** ** ******! * ********* **** ** could "****" **** * ******* ** * ******* ** ****'* all *** *** ***** *******. *** ***** ****** *** *** cameras *** **** ***** **** ***** ****** ******** *** *** 5 *******. ** *** *** *** ***. ******* ********** *** camera ***** ** * *** ***** **** ** *** **** powerful ** ****** ***** *** ********* *** ** ****** ** generous ** ** ***** **** ****. ** ******** ** *** spare ***** *******, * ***** ** ******* *** * ***** cameras **** *** ******** ** **** *** ** *** ******* failed. ** *** **** ****'* ********.

** **** ** *********** ** *** *** **** *** *********** power ******* *****. **** **** *'* **** *****, *'** *********** the ***** ***** *** **** *******. ***** *** *** **** ideas!