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gmartz

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Posts posted by gmartz

  1. Posted

    Hi!

     

    So we're having a problem when using centralized power supply. Here's the system (residential installation btw):

     

    6x Analog 700TVL (960H) Cameras DC 12V

    1x 8-channel (Hikvision) Turbo HD DVR

    1x 18-channel Centralized Power Supply box (individually fused)

     

    Cable wire used: cat5e UTP (with video baluns on both ends for the cameras)

     

    Cable runs are just around 10 to 60 meters (max). What happens is, upon plugging in the cameras to the centralized power supply, we experience interference on the screen (those wavy black bars). When only one camera is connected, it's fine but the more you add cameras, interference kicks in.

     

    On the other hand, when we use individual adapters (12V/1A), no interference experienced.

     

    Will there be a difference if we use a lesser channel Centralized Power Supply box (maybe the 8-channel one) since we only have 6 cameras installed? Lastly, if it says "individually fused" does it mean the power distribution is equal even though we're only using 6 channels out of 18? We're thinking that the box s giving more power to the cameras since it only has 6 connected.

  2. Posted

    Hi,

     

    I would like to ask what NAS specifications should I be looking for when we already have a PC-based CCTV System using Geovision's GV-1220A PCI Card. Currently, the system already has 16 Analog Cameras connected to it. So if we're going to have a 8-bay NAS for additional storage, what brand/model or specifications should I be looking for to be able to store my recording smoothly to it. I'm aware that if you chose an underwhelming spec NAS, the recordings will lag or something.

     

    Thanks in advance.

  6. Posted

    How much spare network bandwidth do you have? If you have a spare PCI or PCI-E slot you could install a new network interface card dedicated to the NAS connection. Also if the processor is going flat out writing files it will struggle to transfer files to the NAS. Perhaps you can schedule for say 3am when there is less camera activity.

     

    Sorry but how do I check how much spare network bandwidth I have? I have to double-check but I think the NAS and IP cameras are all connected on the same switch (Cisco® SRW248G4P 48-Port 10/100 + 4-Port Gigabit Switch). Should I separate the NAS from the IP cameras?

  7. Posted

    We have this issue when CCTV recordings skips and hangs when being to stored to the NAS. On the other hand, there's no problem when it comes to storing it on the PC's local disk/HDD.

     

    The system consist of about 19-20 IP CCTV Cameras. The idea is when the storage of the PC's local disk/HDD reached a particular level, it will then store the recorded files to the NAS so that the PC's storage won't be full. Btw, we use NVS Client software on the PC.

     

    Any suggestions/recommendations?

  8. Posted

    Hi,

     

    Could the said software ( NVS Client v2.3.2.8 ) cause the problem in which the recorded files from the CCTV cameras skips and hangs when viewing it? The problem is only experienced once the recorded files are being saved to the NAS. On the other hand, when it is only saved on the PC's local disk, there are no problems encountered.

     

    So which one is causing the said problem? Software? NAS? PC?

     

    It is given that all IP CCTV cameras connected to the PC have stable network connection.

     

    Thanks!

    nvs.thumb.PNG.387c8b0b887938cf2a16bf31ecfad4a3.PNG

  9. Posted

    I'm not sure if I'm in the right section to post this one since I couldn't find a section for NVRs.

     

    Anyway, could anyone explain what does Decoding mean when it comes to DVRs/NVRs?

     

    I'm checking out this data sheet of Hikvision's DS-7600NI-E Series (Plug&Play NVR) and it says:

     

    Decoding Capability

    4-channel model: 4-ch@1080p

    8-channel model: 8-ch@720p, 6-ch@1080p

    16-channel model: 16-ch@4CIF, 12-ch@720p, 6-ch@1080p

     

    Does this pertain to the NVR's live viewing?

     

    Thank you in advance!

  12. Posted · Edited by Guest

    Hi,

     

    So we have this 2MP IP dome camera from Hikvision (Model: DS-2CD2720F-I) and upon testing several units, we observed that its IR reacts a bit late. If we turn off the lights, the IR will activate about 4-5 seconds. On the other hand, when we turn back on the lights, the IR will deactivate after 4-5 seconds as well.

     

    Is there a setting for this? 'cause normally the IR should activate/deactivate instantaneously (or at most 1-2 seconds? lol).

     

    Thanks for the help in advance.

  13. Posted

    It depends. In some switches it will only allow you to pull one camera feed and sometimes it won't let you pull any camera feed unless its a managed switch and you open up 2-way traffic. But i would not put in the UP_LINK port, its really no difference in that nor in a regular port, speed wise.

     

    Noted. Thanks for the heads up.

  15. Posted

    It is fine to plug your NVR into a POE switch, switches "usually" do not give a device power unless it asks for it(a smart switch). So you should not have any issues, if it makes you feel better, just disable the POE in the Web Interface.

     

    Also make sure that switch is sized accordingly to the amount of power the cameras will drawl. Not sure what the max wattage that switch is rated to.

     

    Thank you for the feedback! Yup, I'll just make sure to disable the POE if it doesn't automatically deactivates.

     

    Upon double-checking, the IP cameras max power consumption is between 7-8W, while the POE switch has 170W power budget. Computing it, all cameras will consume around 150W in total. So I think it's still safe, right?

  16. Posted

    Hi!

     

    I would to verify the following concerns I have in mind:

     

    The PoE we're going to use is: ZyXEL GS1900-24HP. Is it okay to connect the NVR to any of the ports of the PoE Switch since it doesn't have any uplink port? (given I switch off the PoE for the said port).

     

    The system consists of:

    6x 3MP Hikvision Varifocal IP Bullet Camera

    4x 2MP Hikvision Varifocal IP Bullet Camera

    9x 2MP Hikvision Varifocal IP Dome Camera

    1x 32-channel Hikvision NVR

    1x Zyxel 24-port Gigabit PoE Switch

     

    All devices will be connected to the said PoE Switch.

     

    Let me know if I missed something.

     

    Thank you in advance!

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