ok, I have searched and found what I though was needed. long story short I have bought to different balun convertors with no luck:
http://www.staples.com/Night-Owl-Passive-Video-Balun-With-Power-For-Security-CCTV-Systems/product_IM1TW9304?cid=PS:GooglePLAs:IM1TW9304&ci_src=17588969&ci_sku=IM1TW9304&KPID=IM1TW9304
I have a swann 1080 dvd camera setup that takes poe ethernet cables. The swann poe/eth cameras are about 250$ each. I wanted to add two additional cameras that were 700tvl. everything I could find was bnc connectors. Well the two different convertors i bought (link above) will not connect the camera to the dvr. I even have power going to the balun, power to the bnc camera and then converted to ethernet.
Im after a couple solutions; either a bnc to ethernet converter that will work. a POE style camera that will work thats cost effective, or hell I'm hooking it up wrong and need the appropriate advice to hook it up.