4KS2E - new version of NVRs

[Engee]

Hi,
there is a 4ks2e version of nvrs now. The only difference is the support of ext-poe?
This means that more power is on the switch part?
The quality of transmission (electric aspect) will be also better for normal-poe-distance?
Is there a toggle where one poe port is "normal" mode and another is "ext"?

 

[Guido87]

Hi,
there is a 4ks2e version of nvrs now. The only difference is the support of ext-poe?
This means that more power is on the switch part?
The quality of transmission (electric aspect) will be also better for normal-poe-distance?
Is there a toggle where one poe port is "normal" mode and another is "ext"?

I am waiting for the 4ks2e to arrive. I bought the one without poe. Difference with normal one is that the new one van record smart codec I think.

 

[Arjun]

@EMPIRETECANDY might have some more info on this. Many like to have dedicated PoE switch, but for those that want that cohesive setup, this type of NVR with built-in PoE still has its place

 

[Engee]

smart codec?better quality in lower file size?

 

[MacFun]

@EMPIRETECANDY might have some more info on this. Many like to have dedicated PoE switch, but for those that want that cohesive setup, this type of NVR with built-in PoE still has its place

With an NVR with integrated POE, can these ports be power cycled individually? Also, can an external POE switch be used with an NVR that happens to have POE?

 

[Arjun]

An external PoE Switch can still be used with that an NVR that happens to have PoE. The only limitation will be recording capability; you'll still be limited to 16-channels (in other words, 16 cameras) provided you buy a 16-channel NVR.
The PoE ports on the NVR are limited in function; mainly for connecting and powering the cameras and accessing its interface mainly through the NVR is its sole function. Though you can always access the camera settings on the camera-interface itself, provided you connect a spare computer to one of the ethernet ports behind the NVR.

Most users here seem to agree that configuring and connecting cameras to the network is best through a dedicated-separate PoE Switch. Many PoE Switches exist; a customized list has been prepared by @giomania

With an NVR with integrated POE, can these ports be power cycled individually? Also, can an external POE switch be used with an NVR that happens to have POE?

 

[toolazyforalogin]

Though you can always access the camera settings on the camera-interface itself, provided you connect a spare computer to one of the ethernet ports behind the NVR. [/USER]

Just an FYI with the newer firmware on the 5216 NVR you can access the cameras through the nvr login screen or OSD without needing to plug into the actual nvr anymore.

 

[catcamstar]

The PoE ports on the NVR are limited in function; mainly for connecting and powering the cameras and accessing its interface mainly through the NVR is its sole function. Though you can always access the camera settings on the camera-interface itself, provided you connect a spare computer to one of the ethernet ports behind the NVR.

Hi Arjun,
I do not want to question your expertise, but my 5216-16P does allow *direct* connection outside the POE lan toward the cameras: eg http://ip-NVR:10080 does an automatic portforward to the (private) subnet with the POE camera (eg 10.0.10.10 for example).
Hope this helps you too!
CC

 

[Arjun]

I along with others strongly advise not to port forward anything even if that is inclusive to your network, even that includes port-forwarding to the subnet within the local network. Configuring a VPN, as well as VLANs, or even an entirely separate network from your everyday network helps.

Would also advise to not stick with any default commonly used port numbers

Hi Arjun,
I do not want to question your expertise, but my 5216-16P does allow *direct* connection outside the POE lan toward the cameras: eg http://ip-NVR:10080 does an automatic portforward to the (private) subnet with the POE camera (eg 10.0.10.10 for example).
Hope this helps you too!
CC

 

[catcamstar]

I along with others strongly advise not to port forward anything even if that is inclusive to your network, even that includes port-forwarding to the subnet within the local network. Configuring a VPN, as well as VLANs, or even an entirely separate network from your everyday network helps.

Hi Arjun, I'm the last person to say people need to add portforwarding, I'm simply stating that putting a (vulnerable) PC alongst inside the subnet of the POE side of the NVR may not be the best option either ;-) My NVR is blocked within its proper vlan only reachable through a VPN server. So the "internal" portforwarding of the NVR is not exposed at all, except within that vlan, but it helps that I can directly connect to the IPC whenever needed by using the built-in NVR port forwards.
Have a nice day!
CC

 

[Engee]

Hey, I am waiting for delivery of 5216-16p-4ks2e from andy. my question is are there any limits in terms of mpix cameras? will it work with 16 x 8mpix dahua cams?

 

[catcamstar]

Hey, I am waiting for delivery of 5216-16p-4ks2e from andy. my question is are there any limits in terms of mpix cameras? will it work with 16 x 8mpix dahua cams?

I can't count as I skipped primary school, but I'll give you some hints:
step 1: specification sheet of that NVR: http://au.dahuasecurity.com/downloa...NVR5216_5232-16P-4KS2E_Datasheet_20180201.pdf
step 2: look for "maximum bandwidth", for this NVR: Max 320Mbps Incoming Bandwidth
step 3: divide that number with your number of cams: Max 20Mbps per camera with constant video stream
step 4: 8Mpix renders less than 4fps to reach that stream

But like I stated: I skipped mathematics, as there are lots of variables to play with (to start: Variable Bit Rate, but also the video/audio codec (H.265+ versus H.265 versus H.264 versus MJPEG). Dang, I shouldn't have skipped these classes

Cheers!
CC

 

[Arjun]

I thought you had two physical networks and therefore overanalyzed what you were explaining Internally, 10080 works for me too and and that too reachable via VPN and is designated within its own vlan as well.

Hi Arjun, I'm the last person to say people need to add portforwarding, I'm simply stating that putting a (vulnerable) PC alongst inside the subnet of the POE side of the NVR may not be the best option either ;-) My NVR is blocked within its proper vlan only reachable through a VPN server. So the "internal" portforwarding of the NVR is not exposed at all, except within that vlan, but it helps that I can directly connect to the IPC whenever needed by using the built-in NVR port forwards.
Have a nice day!
CC