Tharma 0 Posted September 15, 2009 I am planning to carry out a centralized monitoring system among the cameras fixed in DVRs that are placed in different location. Below is the list of questions I would need your help to clarify 1) In the existing system, there is a DVR recording for 16 channels. It has been fixed to store the recording data. The distance of centralize monitoring place from each DVRs location is 2km and above. For this situation, please advice on the cabling job and highlight what type of fiber should be used to carry out the video transmission 2)I plan no more use the existing DVR system and transmit all the analogue data to the NVR with using end coder as middle device convert the analogue to ip signal ,please advice on this circumstance on criteria I should follow when choosing a good NVR system which will support more than a 100 of camera (static) and please let know how to calculate the storage of HDD in a NVR. (no.days:45;fps;25: hours:24 ; real recording ; resolution :Need your advice on which is the best ;channels;16) 3) Please advice me on a good brand of the CCTV surveillance system Thank you for the kind advice and the time Share this post Link to post Share on other sites
suky 0 Posted September 17, 2009 1) The distance of centralize monitoring place from each DVRs location is 2km and above??? A: Why not locate them together and get remote access after local network setup and remote network setup. For 2km is quite a long distance, the vedio will lose some during long distance transmission no matter how wonderful the cable is. If impossible, choose video balun to extend the cable. But I doubt its effect. 2)Are you going to hook 100 network cameras, if so, NVR would be a good choice! 3)For CCTV surveillance system, You can try Zmodo with quite reasonable price! Thank you for the kind advice and the time Share this post Link to post Share on other sites
questioneer 0 Posted October 2, 2009 1) In the existing system, there is a DVR recording for 16 channels. It has been fixed to store the recording data. The distance of centralize monitoring place from each DVRs location is 2km and above. For this situation, please advice on the cabling job and highlight what type of fiber should be used to carry out the video transmission Fiber can be either single mode or multi-mode. Either will transmit over 2km, based on the data conversion. Multi-mode will be less expensive to convert, but single mode is capable of longer distances. If in doubt, and a quick answer is required, ask for or pull single mode to be safe, but know when doing so that the cost on conversion will be higher. MAKE SURE THAT THE FIBER IS APPROPRIATE FOR BEING IN THE ENVIRONMENT THAT IT IS IN. You don't want to pull 4KM of fiber and find out later that it should have been rated for certain conditions, ie underground/submerged/heat/armor/etc. I wouldn't worry about losing video quality over this distance. To do this properly, you will install a "layer 2" or "layer 3" switch/router, most likely L2 for your application. This will use TCP/IP protocol for controlling data loss. I do this all the time. As long as you design the fiber and equipment properly to account for db loss over the exact distance, you will be fine. If you don't know how to do that, I recommend subcontracting the fiber work to a company that does fiber every day. 2)I plan no more use the existing DVR system and transmit all the analogue data to the NVR with using end coder as middle device convert the analogue to ip signal ,please advice on this circumstance on criteria I should follow when choosing a good NVR system which will support more than a 100 of camera (static) and please let know how to calculate the storage of HDD in a NVR. (no.days:45;fps;25: hours:24 ; real recording ; resolution :Need your advice on which is the best ;channels;16) The answer to this question depends on the encoding, image complexity, motion percentage, and other factors (in some cases, it even depends on the manufacturer as they may put metadata into images, be using RAID that stores to multiple hard drives simultaneously, etc). In short, "depends on the manufacturer and also the conditions at the site." Need more information to answer. 3) Please advice me on a good brand of the CCTV surveillance system Need more information about the application. a good CCTV system for one application / end user / environment is a bad cctv system for another. Share this post Link to post Share on other sites
Tharma 0 Posted February 17, 2012 Thankd friends for your wonderful advice!!!! Dear Friend can you suggest me any software which can support to design a CCTV layout Share this post Link to post Share on other sites
Soundy 1 Posted February 17, 2012 Thankd friends for your wonderful advice!!!! Dear Friend can you suggest me any software which can support to design a CCTV layout Check this thread: viewtopic.php?f=15&t=21165 For CCTV surveillance system, You can try Zmodo with quite reasonable price! Share this post Link to post Share on other sites
fa chris 0 Posted February 18, 2012 Get a video server, like this: http://www.axis.com/products/cam_291_1u/ to convert the analog cameras to IP, run the encoder into a network switch next to it which has a fiber uplink. This will future proof your system by creating a security network with a switch in each location, allowing you to add additional IP cameras or easily replace the analog cameras with IP cameras over time. Run single mode (or multimode, for 2km distance it doesn't matter), to a switch capable of fiber on the other end with your NVR hooked into it. For your NVR, you can use any off the shelf servers as long as they meet the spec's of the software you're going to use. Dell, HP, whatever... you can have multiple servers can scale it accordingly for your storage requirements. 100 cameras is no big deal. The hardware is the easy part. What you really need to focus on is the software you want to put on the servers, which will handle all of the cameras and all of the recording, playback, and everything else. Share this post Link to post Share on other sites
