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Workstations locking up on wireless system

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    Workstations locking up on wireless system

    I have a network of 15 workstations connected wirelessly to a server. A few of the workstations connect and run my applicaion just fine. But most of them connect, then lock up when opening forms. This happens most of all when several workstations are logged on at once. I have 4G RAM on the server, which runs Windows 2003 Small Business Server. The operating system on the workstations is Windows XP. Any ideas why I am getting such bad behavior?

    I have run my application on hardwired workstations with no problems.

    #2
    Re: Workstations locking up on wireless system

    Hi Wallace,

    For a start, is the application using a shadow data base?

    Are the signal strengths OK on all the wireless cards?

    There are lots of things to check.

    Regards

    Ed

    Comment


      #3
      Re: Workstations locking up on wireless system

      I wish I could be of help. However, several years I ago I had a client who wanted to go wireless with around 5 workstations while the rest (maybe 10) were wired. They spent a lot of money on equipment and consultants and the wireless setup never worked in an acceptable manner, not just with my application but many other programs as well. They ended up scrapping all the wireless stuff and wiring everything.

      So, I wish you luck and if you get it working well, please let us know what the problems/solutions were.

      Ray

      Comment


        #4
        Re: Workstations locking up on wireless system

        A problem that Cal diagnosed, and that I ran into also, is that if 2 workstations have wireless keyboards and or wireless mice, the one workstation will occasionally receive and act on the keyboad and/or mouse actions of the other workstation - especially if they are very close to each other. I encourage all clients to NOT use anything wireless.
        Cole Custom Programming - Terrell, Texas
        972 524 8714
        [email protected]

        ____________________
        "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

        Comment


          #5
          Re: Workstations locking up on wireless system

          Thanks for your responses. It looks like this may be a case of not finding a solution, or even a workaround. I have three wireless networks I will be trying to get working. If I find any clues which help, I will post them. Thanks again for sharing your experience.

          Comment


            #6
            Re: Workstations locking up on wireless system

            Ed, the workstations do use shadow databases. The signal strengths look acceptable. What other things should I check?

            Wallace

            Comment


              #7
              Re: Workstations locking up on wireless system

              I don't think that traditional Alpha with dbf's and a wireless network is a good mix.

              If I was forced to try, I would only do it using a client/server configuration or with Terminal Services. That way any connection fluctuations that you might encounter with wireless should not affect the performance of the database.
              Finian

              Comment


                #8
                Re: Workstations locking up on wireless system

                Wallace,

                Have you set the ip addresses on each machine. I believe you will need to do this if you have more than a few machines and even then they can assign their ow addresses that conflict. That equals lockup. We have 30 at our work place and had a serious problem with that.

                I have never had much luck with more than 2 or 3 computers on a wireless network.



                .
                Dave Mason
                [email protected]
                Skype is dave.mason46

                Comment


                  #9
                  Re: Workstations locking up on wireless system

                  Alot of good ideas and suggestions posted here. I just wanted to touch base on a few different things involving a wireless network.

                  What type of network are you currently running? A, B, G, N, or a mix of them?

                  If all the other computers are turned off, can the problem machines connect and run the database?

                  Is it the same machines every time that have problems?

                  Are you running any form of encryption over the wireless signal?

                  Have you updated the firmware of the wireless router?

                  Have you updated the drivers for the workstations?

                  ----------------------------------------------
                  The main difference between a wireless network and a wired network is bandwidth. The issue you describe while doesnt instantly mean bandwidth issues, sounds like bandwidth could be a cause.

                  A typical wired network runs at 10, 100, or 1000 Mbps. A wireless network speed is based on the type.
                  802.11A - wireless type A 54 Mbps
                  802.11B - Wireless type B 11 Mbps
                  802.11G - Wireless type G 54 Mbps
                  802.11N - Wireless type N 200+ Mbps

                  But those speeds are just the base, no overhead. Throw in the normal network packet overhead, running two types of wireless network, encryption, or multiple users on the same network and you will greatly reduce the speed.

                  In a wired network you do not share the cable between your computer and hub/switch/router. In a wireless network you do share the speed, so a multiuser wireless network will have to share the speed where as a wired network with multi users will not (this statement is very generalized but gets the point across).

                  To better increase your wireless network you can upgrade to the type N network if you have not, only issue there is the spec is not finalized, i.e. its still in draft mode. So some products may not work with other products. Its always best to use the same vendor for the wireless routers and wireless network cards.

                  Another method is to saturate the area with multiple wireless access points. THis way you limit the number of users who will use a particular access points. Instead of 20 on one access point, have 4 access points and each only support 5. This way your not dividing the speed between 20 people but between 5.

                  Hopefully this will help clear up some things for you.

                  -Andy
                  Andrew

                  Comment


                    #10
                    Re: Workstations locking up on wireless system

                    Thank you all for your ideas, suggestions, and discouragements, ha! I will explore them and post any interesting conclusions.

                    Comment


                      #11
                      Re: Workstations locking up on wireless system

                      Glad, you got all the response that you did.

                      Ed

                      Comment

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