so you could get a cisco system used for video confercacing, then you convert the video to anything you want, with video capture card,  or  other,  i meen all protocalls start with H are used for video audio conferaceing and or phones, as the compreshion rate not to be confused with rtsp now here interesting quistion can cisco video confenaceing servrs handle rtsp ,   now from what i understand video trasport dose not happen over rtsp rather this is a seed to send it along another protocall,    so in short device must support bouth or will fail,  also u need layer 3 swich not one at bestby, it must handle higer bandwith used by video,     O by way one thing we all forgot all cisco camers also trasfers all video feeds to ftp sever,  all one needs do is stream live from ftp server probem solved ... View more

dhcp and dns come in on udp ports,   now i know this never been even consider but is it possable sent rtsp over port 53 udp,    now i got 3 camreas i getting ready set up, and i can get up to date software for poe swich, so only quistion becomes can the stream be sent over port 53. 136 500 each these ports required as well ports 67 and 68  it would be a intresting test to see if it could be done,    i do know for fack that they can use port 53 udp to set up vpn for hacking, saying this why cant streaming be sent over same port,   only probem i might see is with a busness domain or other dns servers,   but ports offten run more one protocall over them, this wold be worth testing, as if it could work, would solve ton probems,one could run these on diffrent vlan and use port forwarding to that vlan not ever been consider but worth to try ... View more