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    Long distance USB connections.

    Are there any affordable ways to run USB over long distances. I need about 100 to 200 feet of USB connectivity.
    -Rupp
    sigpic

    #2
    I don't have a specific product to point you to, but I know USB over CAT5/6 devices exist.

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      #3
      There are USB extenders. I saw one at CompUsa last time I was there. I don't know the max distance.

      Jon


      Originally posted by TakeFlight
      I don't have a specific product to point you to, but I know USB over CAT5/6 devices exist.
      Jon Ort
      JonOrt@The--Orts.com
      (Remove the dashes in the address, spam is getting out of hand)

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        #4
        I've been looking, and haven't found a good solution yet.

        The length of a USB cable is specified in time: 26 nanoseconds for high or full speed, and 18 nanoseconds for low speed. That means that a perfect cable would by limited by the current speed of light to 25 1/2 feet, but perfect cable is expensive (and hard to find). You get only 17 feet for low-speed.

        The extenders that Jon eluded to are simply single-port hubs. They repeat the USB packets on what is in essence a duplicate USB bus, so it can theoretically get you an additional 25 feet. You can string them together, up to a maximum of five.

        Other approaches involve taking the USB packets and translating them to a different medium, such as Ethernet, and then recreating a USB port at the other end. I haven't found any of these that are cheap. Except for:

        I found a Bluetooth/USB adapter at Fry's for $15, but it was only meant to handle a printer.

        I'm still looking . . .

        Comment


          #5
          I have found only one general purpose IP/USB adapter that sells at retail for about $100. They stock them at CompUSA and they have been mentioned before on this board. I did try to use a IP/USB printer device, but I was not able to do anything with it except run a usb printer via ethernet. When I have a choice I use serial interfaces so I can put them behind the old Lantronix IP/Serial units which are dirt cheap on ebay.

          I do run active entensions at 15 ft per drop with some hubs along the way for some of my USB. Probably about 50 ft total on the longest run. It generally works, but there are times that one one the connections is lost and I need to manually unplug and replug it to restore communications. Since they are run under the house it is a hassle to restore it.

          Comment


            #6
            I wonder - if you had a USB 1.1 device on the far end, if the range would be better and more reliable (lower bit rate?)

            I think I read that if you have one or more USB 1.1 devices plugged into a USB 2 hub, and even if the devices are idle, any USB 2 devices must drop to USB 1.1 rates. Not sure of this though.

            Comment


              #7
              I don't know anything about it or how well it works but a google search found this (and many others)...

              http://www.lindy.com/us/productfolde...2801/index.php

              Comment


                #8
                Here you go, I use this and it works well

                Thanks

                Thom

                http://sewelldirect.com/usb2extensioncable.asp

                Comment


                  #9
                  I've seen USB 1.1 to cat5 for $80 or so.

                  http://www.everythingusb.com/hardwar...nce_extension/

                  Comment


                    #10
                    In my case I use USB from a pair of computers to a KVM for mouse and keyboard. Computers are in the garage and workspace is in the Den. It is USB 1.1. What is most annoying is that one of the computers will not boot when the USB connection is lost because it cannot find a keyboard.

                    Comment


                      #11
                      Originally posted by HINTONTOWERS
                      Here you go, I use this and it works well

                      Thanks

                      Thom

                      http://sewelldirect.com/usb2extensioncable.asp
                      That's about 80 feet shorter than I need.
                      -Rupp
                      sigpic

                      Comment


                        #12
                        Any of you guys have experience with a cable like this:
                        http://www.geeks.com/details.asp?inv...at=CBL&cpc=JAD
                        -Rupp
                        sigpic

                        Comment


                          #13
                          Depending on what USB devices you are trying to connect, the Keyspan USB server works pretty well. http://www.keyspan.com/products/usb/server/

                          I have used it to remote a camera and a printer.

                          Alan

                          Comment


                            #14
                            Try this this 4 port hub over Cat5.


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                            -Larry

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                              #15
                              Personally, I'm waiting for this...

                              http://www.belkin.com/pressroom/rele...leFreeUSB.html

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