Rafeeq

I am new to the IP CCTV System, So please bare with me. I would like to know how to install 4 IP Cameras in my Office with out disturbing my network Server. What all the unit do i need to record at least 15 Days. Please let me know Thanks in Advance

I need to know how to select the right camera for the right place. Example some High area, Long boundry area, Small stairways, High temperature area, and very large compound. Also What an extra advantage in IR camera than a Day Night Camera