Using CAT 5 or CAT 6 for USB Extension

Archived from groups: comp.dcom.lans.ethernet (More info?)

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?
8 answers Last reply
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  1. Archived from groups: comp.dcom.lans.ethernet (More info?)

    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...
  2. Archived from groups: comp.dcom.lans.ethernet (More info?)

    > 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.
  3. Archived from groups: comp.dcom.lans.ethernet (More info?)

    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.
  4. Archived from groups: comp.dcom.lans.ethernet (More info?)

    > 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&...


    Very good advice. Thanks! By the way, what has me excited about this
    project with video surveillance was that I'm a Linux PHP/PostgreSQL
    developer who's got the entrepreneur bug, and when my boss told me in
    my IT Operations day job that they paid $30K for the 8 camera system
    they have now, and heard it was $13K just to add 3 more cameras, I
    said, d*mn -- I have to get my rear into that business. The same goes
    for Asterisk PBX solutions on Linux -- we paid $80K for our current
    call center PBX solution, and Linux solutions can be far cheaper and
    yield high profits for Linux gurus who can get it going with Asterisk.
    And then there's the topics of keyless door entry (card, thumb, etc.)
    and timepunch, hooked through Linux, which can yield good profit too.
  5. Archived from groups: comp.dcom.lans.ethernet (More info?)

    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
  6. Archived from groups: comp.dcom.lans.ethernet (More info?)

    googlemike@hotpop.com wrote:
    > 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?

    I don't have USB experience, but I believe there are two
    separate issues: power and signal.

    Power (5VDC & ground) doesn't travel well but can easily be
    replaced by a powered hub at the endpoint. AFAIK, powerloss
    is the first thing to cause USB to fail.

    USB signals which should respond well to better treatment
    like Cat6 cable.

    -- Robert
  7. Archived from groups: comp.dcom.lans.ethernet (More info?)

    googlemike@hotpop.com wrote:

    > 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?

    There are USB extension boxes that will run USB over a couple hundred
    feet of cat 5 UTP. When I priced them a year or so ago, each set was
    something like a hundred USD. They are largely marketed to the security
    camera industry, so you will have to find some specialist catalogs.
    As for the price of video surveillance systems, most of the expense is
    labor, both for the initial install and the service calls.

    --Dale
  8. Hello
    I tested usb2 over cat6 ,, and have great NEWS

    i tested more than 40 METERS , and have a great connection ( wlan device )

    sow camera's and other parts will work !!!

    also cat5 dit not work good , just try CAT6

    greetings

    maus

    djmaus__@hotmail.com
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