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thewireguys

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Posts posted by thewireguys

  3. Posted

    Only use single mode if you have to as the GBICs and media converters are lot more expensive then MM versions.

     

    What is are your distances from the cameras to the head end?

     

    You have 2 options:

     

    Home run all fiber like you did in your design with a media convert at each pole and a fiber switch or large media converter at the head end.

     

    Daisy chain from camera to camera. This would reduce the amount of fiber you have to run but will increase your switching cost as you will need a switch at each pole. At the head end you would only need a switch with a single fiber port.

  5. Posted

    while jazzar's solution will work I question how costly it will be to make that may splices have you considered changing out the cameras to IP? By the time you pay for all the electronics to convert the analog cameras I wonder if you could switch out cameras to IP and run a pair of fibers to a POE switch

     

    well that's a client's requirement. And I would like to go for IP, need some help on that. If I have to install 16 fixed IP Cams so how much fiber cores i need? 32? because i think IP needs two cores one as Tx and other as Rx (correct me if I am wrong) as opposed to Analog which needs one core (correct me again if I'm wrong).

     

    Multi mode uses 2 fibers so each camera would need a pair. For what you are going to pay to convert analog to fiber and back you can do IP. Plus you will have a much better image.

  6. Posted

    I hope everyone that is reading this understands this is why you never exceed the spec of 100m (328ft). Unless you are using special converters you will never have a reliable connection.

     

    I would recommend you look at these units from Vigitron: http://www.vigitron.com/101/Vi2300A_Mini_MaxiiCopper_High_Speed_High_Power_Ethernet_Extender_over_UTP.aspx

     

    You can put one unit on either end of your cable and these will power your camera.

  12. Posted

    Most VMS/NVRs have audio but they are not easy for people to use compared to just picking up any VOIP phone and pressing 9.

     

    A VOIP SIP system will work just fine for you and is what I would recommend.

     

    Have a look at Stentofon SIP solutions. As you can see below you can use any VOIP sip phone to page the speakers. You can use speakers with built in SIP or you can use the SIP module and connect it to any amplifier and make it a SIP device.

     

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    Axis also has a IP SIP Horn

     

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  13. Posted

    First thing you need to do is figure out how much bandwidth you have and/or paying for.

     

    Then you need to check the "change display quality" setting and make sure it is set to no more than "high (default)"

     

    You have "max bit rate" option from the camera that you will need to adjust. Be default the max bit rate is 12Mbps you can change this limit much lower until you find a happy medium between image quality and bandwidth.

     

    You will also want to look at the "image rate" and "keyframe interval". Reducing the image rate will reduce bandwidth and you will want to match the "keyframe interval" to whatever you set the "image rate" to.

  19. Posted

    That's kind of what I expected. I'd be willing to drop a few bucks on an Avigilon multisensor camera if it only used 1 license and had the analytics built in. At least that way I feel like I'm getting more bang for my buck. I have an outside corner where 270 degrees of coverage would be awesome. But it seems like their multisensor units don't have analytics yet. Do you know when that might change?

     

    Good news is the multi-imager only requires one license. Bad news is no analytics at this point.

  20. Posted

    Not gonna happen at this point with Avigilon. If you want analytics with Avigilon I recommend you look at their analytic cameras or Rialto units. Avigilon's analytics are far superior to Hikvsion's so you will get better and much easier to use results.

     

    FYI at ISC Avigilon showed the new version of ACC 5.6 which you can now search video for people or vehicles only on analytic cameras. You just highlight an area in the video, select people or vehicles and your results are shown instantly. Very impressive.

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