Can I add cameras to the unit that are not plugged in to PoE switch?
Yes, you can add any multiple of cameras between the onboard PoE and your local network as long as you do not exceed the IP licenses.
Are these POE cameras?
Yes indeed there is the option to power these cameras via POE.
How many HDDs can I have in the unit?
A maximum of two HDDs can be installed within the unit.
How do you connect an IP camera to this DVR?
Firstly you will need to login to the unit , go to System -> Digital -> Channel type, then select the configuaration that supporst IP. An IP camera is then connected to this unit via it's RJ45 (lan port) using a network switch or POE switch.
can you use analogue cameras lower than 960h capability on this dir?