Thanks for the info. In looking at all the different products, whether it was a DVR or NVR is sorta hidden amongst all the other stuff.  And when searching for DVRs, NVRs come up also. I'm not going to rewire my house so it looks like I am stuck with a DVR.

The DVR on my Zmodo system died and I need to replace it. I don't want to replace or re-wire the cameras. This is the camera used in the system. http://surveillance.zmodo.com/700tvl-ultra-hi-reso-outdoor-security-camera.html

Features

* 1/4" Color CMOS Image Sensor
* 700 TV Lines, Horizontal
* 3.6mm Lens
* Signal: NTSC
* Night Vision Min. Light: 0 Lux (IR On)
* IR Irradiation Distance: up to 80'
* Operation Temperature: 14F~122F
* Weatherproof: Yes
* Power: 12V DC
* Mount: Wall
* Video Connector: BNC
* Power Connector: RCA 12V DC

It seems like most of the better new DVRs use RJ45 rather than BNC to connect the cameras. Is there an adapter to convert the BNC to an RJ45 input. I have seen the Passive Video Balun adapters that allow you to replace the BNC cable with Cat5/6 cable but that doesn't appear to be what I would need. The end result is still a bnc on both ends.

Can I get something that allows my BNC cameras to use an RJ45 DVR input?

I may add additional cameras at a later date and would like to use newer stuff.

That's no good. I want to see all cameras on my phone or tablet on one screen like I do now and all cameras on a TV via HDMI. Any recommendations?  I would prefer a 16 Camera DVR 5-in-1 5MP.

One like this seems to do what I need although I haven't been about to find out the difference yet between 5MP and 5MP Lite.

https://www.amazon.com/ANNKE-16-Channel-Security-Surveillance-Detection/dp/B08BC6V7S1/ref=sr_1_18?dchild=1&keywords=16+channel+dvr+5mp&qid=1611178535&sr=8-18.

Doesn't seem to be a lot of 16CH DVRs without cameras out there. I see more 8CH.

I'm in PA. My current is an 8 camera. By 4 in 1 do you mean 4 cameras? I plan to get a 16 Channel. So I can use any with BNC inputs?

Some Googling tells me that 4-in-1 " 4in1 Security cameras are considered "universal cameras" because they can output three types of HD over Coax video signals (HD-CVI, HD-TVI, AHD) and analog resolution video (CVBS). "

I have an 8CH H.264 Standalone DVR ZMD_DT_SCN8 DVR with 8 ZModo BNC Cameras attached to it. I installed 6-8 years ago. It went belly up yesterday.

I would like to buy a replacement DVR and use my existing cameras.  It appears that ZModo no longer sells DVRs My question is if I can use any DVR that has BNC inputs. Here is what the ZMode manuals says about its inputs.

Analogue video signal: The video input port is BNC connector plug. The demand of input signal is PAL/NTSC BNC (1.0VP-P, 75Ω).

Since I am replacing I might go with a 16 CH and adds some additional cameras later but for now I just want to get back up and running. Not much in the way of others requirements LAN, HDMI, Android, etc. I really don't want  to install 8 new cameras. These are the cameras.

http://surveillance.zmodo.com/700tvl-ultra-hi-reso-outdoor-security-camera.html

And here are the camera specs:

* 1/4" Color CMOS Image Sensor
* 700 TV Lines, Horizontal
* 3.6mm Lens
* Signal: NTSC
* Night Vision Min. Light: 0 Lux (IR On)
* IR Irradiation Distance: up to 80'
* Operation Temperature: 14F~122F
* Weatherproof: Yes
* Power: 12V DC
* Mount: Wall
* Video Connector: BNC
* Power Connector: RCA 12V DC

I did a search in the forum but didn't find any relevant posts.