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I have 20 analog camera devices that are going to connect to 2 16-channel DVR units.  The DVRs will be connecting to a single-mode fiber optics network.  What devices are needed to accomplish this, and how?  Do I just need a single coax to fiber convertor?  Or some other component to make everything work properly?  If possible, can you draw a small layout that will show what I need and how it is to be connected.

asked 08/22/2011 04:26

aj85's gravatar image

aj85 ♦♦


7 Answers:
Fiber is a point to point connection, so each camera needs to have its own connection back to the central unit, DVR or otherwise.  Here's a company that shows a simple diagram as one example:

http://www.versitron.com/cctv_design.html

How many fiber inputs do the DVRs have?  If they don't have fiber inputs, then you'll need to covert back to coax at the DVR.  You might want to post the model of the DVRs you are going to use so you can get more specific help.
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franked_it's gravatar image

franked_it

Hello Franked,

The model of the DVR is Bosch.

Thanks,
aj85
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answered 2011-08-22 at 14:00:07

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aj85

Okay, sounds like the maker of your DVR is Bosch.  I took a look at their products, and for Analog, 16-channel it looks like that's probably the 600 series of DVR appliances.  I suggest you confirm this by looking at the DVR closely and seeing if you can find the model or series number.  There should be a sticker on the back or bottom that indicates serial and model information.  If it is the 600 series, you can find documentation here:
http://products.boschsecurity.us/en/TAMS/products/bxp/SKUPFT7765028107.P1.F.01U.169.468-CATM5a4c3350e69dde4cf03e9c1f83c5ff2d

It looks like 600 series DVRs have coax connections with BNC connectors.  So you'll need to convert the fiber back to coax for your DVR.  I suggest looking over the Installation Guide for the model that you have as it will give you the connection information you will need to get the right adapters.  If this is all correct assumptions so far, you'll need an analog coax to fiber converter on the camera end, and a fiber to coax converter on the DVR end.  You'll need this pair for each camera.

If I've got this wrong, and you're trying to hook up to an IP network (also known as a computer or data network), then perhaps you have a different DVR, but it would take different devices as well.  The analog cameras would require a device to take analog video, digitize it, then publish it over the IP network.
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answered 2011-08-22 at 15:16:35

franked_it's gravatar image

franked_it

Hello,

Yes the DVR's are model dvr-650-16A100.

Thanks,
aj85
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answered 2011-08-22 at 15:34:23

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aj85

Ok, based on what you've shared, it sounds like you want to transmit the analog video (video and audio or just video?) over fiber using coax equipment.  That does mean you'll need to convert the video at both ends.  

If you can bring all the coax from the cameras to a single spot, you can use a multiplexer and put it all on a single fiber and use a receiver to split it back out to 16 coax: (this one is video only)
http://www.voscom.com/16ch-video-over-fiber.asp

Alternately, if you have fiber to the cameras from the DVR, you will need a transmitter for each camera and a receiver for each of these transmitters:
(this is also video only)
http://www.voscom.com/1ch-video-over-fiber.asp

Notice the specifications at the bottom of each page shows the transmit/receive pair of devices required for this system.  This is just one manufacturer's example of video only over fiber.  I'm certain there are other options out there.  You may want to contact Bosch as they have some fiber modules for their cameras, but you'd have to have the model number of the cameras and give them a call or email.

I would draw you a diagram, but that really depends on what cabling you are working with.  Is the cabling already in place?  If so, then you'll need all the equipment to covert or change out the cameras and DVR.  If it's not in place, I would suggest considering using coax instead of fiber or changing your equipment to models compatible with fiber.
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answered 2011-08-22 at 15:39:26

franked_it's gravatar image

franked_it

Hello,

Just to make sure that I am on the same page with you and understand what you are recommending.  I should connect all of the analog cameras into the bosch dvr, then connect the dvr to a coax to fiber conversion device, that I will connect to the existing fiber network?  I am using RG59 combo cabling.
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answered 2011-08-22 at 17:44:24

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aj85

The DVR is designed to have a single BNC terminated composite video cable for each camera.  That's the input connectors it has: 16 x BNC composite video.  You haven't told us what brand and model cameras you are using, so it's going to be tough to know what kind of connection they have.  If you tell us the model, we can look it up, or you can look it up.

It sounded like you were using an existing fiber optic "network".  Please clarify your intent here.  Are you hoping to have remote computer access to the DVR through the fiber network?  Or are you hoping to use fiber cabling between the cameras and the DVR?

Many modern cameras work over computer or IP networking.  These cameras and the DVR are NOT that type of devices.  Since they are analog video devices, the cabling between camera and DVR is typically standard coax.
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answered 2011-08-22 at 18:06:06

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franked_it

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Asked: 08/22/2011 04:26

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Last updated: 08/27/2011 11:47