SunnyKim

If your friends are Happy with their services, they are the one you should go for.

The price has come down to less U$20 for analog cameras. HD_AHD/HD-TVI 720P cameras are almost in the same level, as you may see on the internet market.

Well all the above is wrong . What do you recommend for the op to go with HIS ALREADY PURCHASED recorder I am not an English. Are you?. If so, please excuse my English.

I missed one point: please google & check out "OV16880" data sheet from Omni. You would be surprised to learn 720P(1MP) camera can be made from 16MP sensor. But if you claim 16MP, you can get more money, even though true resolution fidelity (contrast) might be the same. The fact reveals when checking out the vidoes during low lighted condition. The quality from 16MP and 720P both show quite softened video. I know it is your money. But I like to ask you Why pay more?

Just for curiosity, are wireless CCTV systems the main stream in Inida?

Check those companies whether the cameras supplied are type of HD-CVI, or HD-TVI, or HD-AHD. They are not compatible each other on a HD-DVR. You have match your DVR to the cameras. Some models of HD-CVI DVR do not even support old analog cameras (PAL/NTSC). But most HD-TVI or HD-AHD DVRs are supporting analog cameras, by default.

Can the demo video of 4K(UHD) camera clearly identify a face or license plate? Was it impossible to carry out such things before 4K camera was invented?. Answer is Nope, for both. You may be just wasting money for more HDD and new price tag of a new product. You will have less number frames per second. You will have many small problems of buffering or time lagging when the camera is added to your NVR to which many other cameras already connected. You will need a new expanded NVR that can decode and play back videos. The camera for broadcasting is more expensive than cctv camera. 4K video can be enjoyed on 4K monitor. If you need one, buy 4K (8MP-UHD) cameras dropping 4MP camera? Why? Those guys who are now promoting 4MP will be talking badly about 4MP cameras when they start to promote 5MP/6MP/and 8MP -UHD cameras, soon.

Good to know. DC Power does not go long on a very small diameter cable. AC power goes a lot longer. You better localize DC power source near cameras.

75feet should be No Problem, whatever. Suspect power shortage to drive cameras at night, LEDs, IRs..

The output of HD_TVI camera is an analog signal. No reason T-Type signal splitter should not work. Anyway, another solution is the same as "Securame" suggests. Buy an NVR that can receive all compressed streams from the HD-TVI DVR that connects and records all the HD-TVI Cameras.

Most analog cameras (NTSC or PAL) have no troubles up to 150 meter distance, even with bad quality cables. So you are saved a point to count. Power seems to be the cause. DC power does not go long distance and needs a power cable of a larger diameter for sending more watts. Get the localized power source for remote cameras outside. Best save is to bring a local CCTV installer.

Tough question to be answered. I do not think the standalone DVR could do better than PC based DVR, as long as wirelessly connectetd.

Check the menu of your camera, to have a better video under low lighted condition 1. Turn off WDR function, if any. 2. Turn on (enable) 3DNR (noise reduction), if any.

You may carry out the test in the night when LEDs or IRs draw more powers.

600ft is OK for analog cameras, but is quite challenge for sending HD sized video to your remote DVR. So, your choice may have to narrow down to IP camera system. 600 ft becomes also challenge for sending DC power (not AC) for cameras.

Good !!. But 1080P X 8 Ch could get you some problems (Network/Traffic/HDD/smooth decoding play back or spot monitoring, etc). But 720P X 8 Ch would be OK, which is Cheap and I recommend. Finally, I do not think you may come across the mother board for your OLD DVR.

Please allow me to add more: HD-TVI was proposed and promoted by HikVision and TechPoint. HD-TVI decoder chipset is designed/manufactured by TechPoint. They know very well about technoloy of NTSC/PAL decoder. But I am Not Sure TechPoint is allowed to design NTSC/PAL decoder, Legally. Actually its founder was the founder of Techwell which was sold to Intersil. So the HD-TVI DVR may or may not carry a separate decoder (NTSC/PAL) for supporting the conventional analog cameras. But I know HD-AHD supports both HD-analog and NTSC/PAL with a single chip. That may explain the popularity of HD-AHD among Chinese DVR manufactures who counting every penny.

Both samung and Hikvision's are all OK. But not sure they would meet your expectation, because zmodo failed. Buy the one that you are allowed to return.

7/24 must be a hard work. They do not ask for 7/24 for his car or TV or smart phones. It's good one if the DVR lasted a year and half, though most of them running more than 5 years. Get the DVR costing less U$50 on the internet. If it breaks, then buy the new one. Probably costing you less than U$40, by then. Plug and Play is default for analog system. No tech support needed once you experienced. Firmware updates/ New Apps, brahs brahs ... are all luxuries you have to pay. One more note: Buy the DVR that can record each camera in 960H or D1. Some DVRs are limited to CIF resolution that you have to avoid.

.If they say Analog-HD and BNC, there could be 3 kinds, so far; HD-CVI, HD-TVI, and HD-AHD. None of them compatible each other. And the DVR is supposed to support only one kind. So you may have to try out for yourself, or ask Q-See of camera systems.

Please allow me to explain. The HD-CVI decoder (RX) chip is owned and manufactured by Dahua. The chip may not be able to handle the conventional NTSC/PAL signal, which is output of analog cameras. (That I am not 100% sure of.) So the DVR have to add the NTSC/PAL decoder chip, meaning cost up, or simply not to support the coneventional analog cameras. That's why. You may have to find another DVR model or go for HD-AHD, or HD-TVI.

Firmware issues. You better check out with Tech Support at Foscam.

Pretty much old. It is time to be gone. Your old system can not be linked to Wifi directly because it can not do any compression. I do not think your old system can be recording to HDD. You can save cameras but you can buy brand new one with less U$20. The new system, if you go for analog cameras and DVR, can be done with U$300, including HDD and Monitor-LCD.

No, most likely. HD-TVI(HikVision) and HD-CVI(Dahua) are not getting along. They do not co-op.

Both DVRs are for analog cameras. No compatiblity issues. Just Plug The Old Cameras into a new Analog DVR with recording resolution D1 or 960H, for each camera. Any 8 Ch Analog DVRs (no HDD) can be bought less than U$50 on the internet.