I'm running 8 Dahua ip cams 5mega pixel with infrared, and the pictures are very clear. I would suggest getting the wide angle ones (3.x mm lens) unless you have a very long hallway.
I would shop alibaba and get them shipped straight from china. The ones i got were sold for almost $200 each here in the US, I picked mine up while overseas for about $80 a pop.
Can anyone explain for the uninitiated...NVR, POE, TP-Links?
Thanks in advance.
POE - Power over Ethernet. security cameras are assigned an IP address (internet protocal address), so it behaves like a mini-server in your home network. POE uses two of the conductors in the ethernet cable to power your security camera. The advantage of this is you dont have to run two cables (an ethernet cable for the data that the camera is sending, and a DC power line. The disadvantage of this is you need to get a POE switch/hub ($15-$150, depend on number of camera and level of sophistication)
NVR - Network Video Recorder. All those security cameras send their videos to a NVR so you can record and view them. If you have cameras that have panning feature, NVR is where you control this function. Think of it like the VHS recorder, but with much more functions.