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I would go for Hikvision, but both would do the job properly. With Hikvision 7216HVIST you would have 16ch CIF real time or D1 6fps (you can choose on each channel); with Dahua 1604LE-A you would have 2ch D1 real time (channels 1 and 9) and 14ch CIF real time.

If the data has already been overwritten, there is no way to recover it.

My favorite hidden cameras are hand made. You can put a good, small, pinhole camera in many places. viewtopic.php?f=5&t=20325

Both PSUs should work, each camera needs max. 180mA, so even the 5A 18 output model should be enough. If you have many long cable runs, or if the price difference is not too much, I would take the 11A model.

It is a myth

Ok, I really can not tell you for sure if iVMS4500 is compatible with 70xx series, and I do not have any of these units any more around to try. If Windows client (iVMS4000) works ok when connecting from internet to your DVR using the data port, but iVMS4500 is unable to do so, I would say that this model might not be compatible with iVMS4500 then, and you will not be able to do much more.

Haven't met that problem yet, since 99% of the cameras we usually install are 12V, but I do find it strange that they do not also manufacture a balun that would lower it to 24V. http://www.utpvideo.com/en/UTP116PV-SV36.html http://www.utpvideo.com/en/UTP101PV-RM12.html

That is indeed a Hikvision, the old (discontinued) 70xx series. I have not touched them for a while, but I am quite sure that the iVMS4500 application should be working fine with them. http://www.hikvision.com/En/products_show.asp?id=15 Hikvision uses two ports for data communication; I do not mean a "port" on the back of the DVR, but a network port. By default, port 80 is for web access, port 8000 is for data. So when you are connecting to the DVR from Internet Explorer, you connect to the web port, and when you connect from a client (Windows software, client for iPhone, Android, etc) you connect to the data port. Check the following capture; those are the dafult values, httpPort:80 and Port:8000 When you are using iVMS4500, you need to configure it with port 8000 (it will be 8000 already by default). Keep in mind that on your internet router you will need to forward both ports (TCP/UDP) to your DVR network IP, I am sure that you have already done so with port 80 if you can connect to the DVR from internet.

On big jobs I also use the following: With The receiver/hub sends 36V to the camera, and the balun on the cameras end lowers whatever voltage it receives to 12V. This way it makes installation very easy, UTP runs of any length (which in the future will need no changes if there is a need to upgrade to IP cameras), and I do not need to worry about different voltages reaching the cameras due to different cable lengths, since the balun on the camera end will just lower it to 12V.

Would you have a picture of that "Colossus" DVR? It might be a 7204 DVR from Hikvision, so it should be working with iVMS4500. Keep in mind that you need to connect to the data port, and not the web port!

Hey targetchip, welcome aboard, I am also from Spain! (Barcelona)

Everyone seems to be using mainly baluns for video? Am I the only one who also uses them for video+power, and even sometimes video+power+ptz?

Nice, do you know what would be the Dahua models equivalent to DG4208HF and DG4216HF?

That will probably be a Dahua card --- I will check with them on the pricing!@ Could be. They also told me about their DG4208HF and DG4216HF cards (8ch and 16ch D1 real time), which would compete with Hikvision DS-4208HFVI and DS-4216HFVI (at a cheaper price); they can even be used toguether on the same computer with Netvision software. "And very glad to introduce our new cards to you which can work with Hikvision cards in one PC system with our software. The new cards are designed to compete with DS-42xxHFV cards. According to our testing, the image quality is even better than DS-42xxHFV. And our new DG42xxHF cards have multi-splits, while DS-42xxHFV only single screen. Enclosed the specification. For more details, please contact me." http://www.netvisiondvr.com/ProductInfo.asp?id=100 http://www.netvisiondvr.com/ProductInfo.asp?id=101&n=1 I have not yet tried any Netvision PCi card, so I can not vouch for them.

Netvision also has a 4ch real time capture card; 1080p 25/30fps, HD-SDI inputs, one HDMI output. http://www.netvisiondvr.com/ProductInfo.asp?id=99&n=1

Great to know! There is v6.0.0.1 on Hikvision web site: "DSFilters player plug-in is a COM component developed based on Microsoft® DirectShow® technology, and it can be used to extract, analyze and decode digital video/audio signals from Hikvision devices. Users can playback Hikvision format media files and streams via standard players such as Windows Media Player." http://www.hikvision.com/En/download_more.asp?id=38

Nice ghetto tester, yup... I bet if you ever have a hands free for your phone, it will look like this one: http://blaza.ytmnd.com/

I do think it does work great, but with some "but"s. I do have motion detection with email alert at my shop, and I think it works great (it gets "tested" once in a while when someone stays here until late, and once a week when they come clean at 8:00). I get notified by email+screenshots whenever there is movement on 4 cameras, weekdays from 20:00 to 09:00, 24 hours on weekends. It did need some tweaking the first days, but I have not had to touch it again. They are all indoor cameras. I did have to remove the alerts on 2 IR cameras, since anything flying near it at night (bugs), would make the DVR email me. I did leave 4 other cameras with MD+email(without IR, but seing with the IR from other cameras), those do not give me any false positives, ever (at least until today). That said, I am sure it would not work in this case, since they are all outdoors cameras. There would be tons of false positives, video MD on outdoors cameras will always have them. If you want email alerts, you will need to use the alarm inputs with beams or whatever else can help there.

LOL I'va had plenty of those too...

I don't know if there are different "ratings" for explosion-proof capabilities, but this one above really doesn't look so much "explosion proof" to me... But you can't really tell just from a picture. Others like this do like more "explosion proof" to me: http://www.ptscctv.com/ProductShow.asp?ID=176 http://www.ptscctv.com/ProductShow.asp?ID=188 http://www.ptscctv.com/ProductShow.asp?ID=174 Looks like googling for "dome ExdⅡCT6" might help: http://www.foresight-systech.com/product.php?category=3&open=1

I know this has been asked before over the years, but here is the same subject again Is there any easy way of accessing Hikvision DVRs from Mac? (besides using a Windows virtual machine, Bootcamp to boot up in Windows, etc). Even if it has to be done with a third party software. I think Hikvision recently announced Mac and Linux clients to be released soon (in some Taiwan fair?), but I do not know when. I can not even confirm it, but I have been told so from my Hikvision supplier, so I will trust them, but I would like to know if there is any way to currently access Hikvision DVRs from Mac. Thanks!

You can open the files from Hikvision File Player, and from there export to any commonf video formats. http://www.hikvisionusa.com/downloads.html Search for "Hikvision File Player V6.004 (5.13.10)" About exporting from video file to JPGs/PNGs, no clue, but once you have a video file you can open easily (Windows Media Player, VLC, Adobe Premiere, etc) I am sure you will be able to find any other tools you want for working on those video files.

Hey mayfair, If you need any help, I am in Barcelona! Welcome!

Your time is not worth anything? If it is, maybe it is about time to burn that damn DVR, and get a good one