Using CAT 5 or CAT 6 for USB Extension
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Posted by on March 31, 2005, 9:29 am
Please log in for more thread options I'm trying to do a video surveillance project in Linux with PHP. I need to record live video coming over USB. USB can only go so far without putting repeater hubs in the drop ceiling, and that requires an electrician to give me a plug for the adapter under the drop ceiling, which is not desirable. Has anyone experimented with getting the USB signal on/off CAT 5 or CAT 6 so that it can be run longer distances without needing a hub? Or would this need some kind of stronger boost? Or what about coaxial? | ||||||||||||||||||||||
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Posted by on March 31, 2005, 1:03 pm
Please log in for more thread options googlemike@hotpop.com wrote: >Has anyone experimented with getting the USB signal on/off CAT 5
http://www.cyberguys.com/templates/searchdetail.asp?T1=131+0944&dept=&search=&child= claims 150', though I've had really awful luck with USB extensions it might be worth a try. Tom's Hardware recently did an article on USB devices that hang off an Ethernet, though I dunno about Linux drivers. Why that particular camera, BTW? There are lotsa cheap Ethernet or coax CCTV cameras available... | ||||||||||||||||||||||
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Posted by on March 31, 2005, 1:13 pm
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> Why that particular camera, BTW? There are lotsa cheap Ethernet or
> coax CCTV cameras available... Yeah, some other people are telling me about this too by other avenues. I'm turned on to this stuff by the cash potential, not because I knew the technology a little. So I'm really green. I feel kind of dumb, but I learn fast. I'm eager to get this going and convince the wife with a demo that proves to her that this can work and that I can sell this cheaper than anyone else can do it because I use Linux and inexpensive hardware, and because everyone else jacks the price up really high. So I'm going to have to look for coax CCTV or cheap Ethernet solutions. I just didn't realize that these are cheaper than web cams when you think of how much hardware you have to add to run a very long cable with a USB web cam. As for wireless solutions, that works with some customers, but not others. Other customers who are more tech savvy realize that webcams can be jammed with jamming devices. Hey, thanks for guiding me this way, William. | ||||||||||||||||||||||
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Posted by on March 31, 2005, 1:46 pm
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I guess I have to counter this now that I have some more info. I don't think Linux drivers are readily available or in good shape yet for CCTV or Video over Ethernet. However, Linux has plenty of USB video drivers, so USB is still a viable option if I can get distance. And someone has now figured out a way to get USB over CAT5 for distances larger than 100 feet: http://cpc.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=CS11725&N=401 So I think I'm going to go this route unless someone talks me out of it. | ||||||||||||||||||||||
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Posted by on March 31, 2005, 6:28 pm
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googlemike@hotpop.com wrote: >http://cpc.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=CS11725&N=401
> >So I think I'm going to go this route unless someone talks me out of >it. Looks good, but please reply when you get it and tell us how it works. USB can have timing (latency) issues even if the signal integrity holds up over the distance. I'd try it first with a short cable to make sure the device is functional... Also, before you spend too much time adding cost to your USB camera, note that (for instance) the D-Link DCS-900 is only $82 from NewEgg: http://www.newegg.com/app/ViewProductDesc.asp?description=30-115-110&depa=0 | ||||||||||||||||||||||
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