Applies to: Zosi POE NVR
The Answer is yes.
The reason why you need power over Ethernet switches will be obvious when comparing PoE switch vs non-PoE switch.But we don't recommend to connect in this way. If you have to connect in this way because of the inconvenience to hook multiple wires in the scenes like between two buildings, please make sure do not add more than the number of corresponding cameras（depends on your unit）into the POE switch and then attach the switch into the PoE port on the NVR.
If you added more than lots of cameras on the one PoE switch and connect the switch to the PoE port on the NVR, the video stream may be delay or freeze.
Please let us know if you have any further questions:
Support Email address: firstname.lastname@example.org
Our Facebook: https://www.facebook.com/ZosiTechnology/
Support center: email@example.com