HOW DOES IT WORK? Some of the advantages of IP-based video surveillance include: Intro to IP Surveillance by Axis Communications

IP based surveillance systems use existing networks and internet technology to transmit images from analog or IP cameras. You have access to live streaming video and still image transfer at a speed of 30 frames per second. This can result in a reduction in cabling costs as we are now transfering video and power (POE) over CAT 5e network cable rather than coax.
Diagrams - .pdf
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Analog Diagram

IP Diagram

Additional features:
provide superior resolutions.
increment.
StealthVid, Inc is an authorized Axis Partner