I hope this is the right news group for this - it is related to\nwireless equipment, although not exclusively a wireless problem.\nEquipment itemised at the bottom.\n\nThe problem:\n\nOn the workstation (using 10/100 card) after a variable amount of time\n(typically 1hr, but sometimes several hours) a little message pops up\nsaying "A network cable is unplugged". This is followed within about\n1 sec by "Local area connection now available". This will then\ncontinually repeat itself at 5-10 minute intervals until the machine\nis reset.\n\nIt is/was mildly annoying when using the workstation but does not\nreally interup work. It is infuriating when working from the laptop\nthough because it causes all connections to the workstation (which is\nbasically used as the network server) to break and the only way to get\nthem working is reset both machines, server first then laptop.\n\nThe problem has now grown much worse. Not only are the disconnections\nmore frequent but they are starting to cause a temporary freeze on the\nmachine which has affected things like recording video from a DV\ncamcorder etc. On occasions, if the machine is left idle, they\neventually cause a complete freeze on the system so it requires a hard\nreboot.\n\nAlso, without any error message at all it sometimes just loses all\ncommunication with the router and the workstation has to be re-started\nto get the connection working.\n\nUsing the laptop linked to the wireless network for surfing /\ndownloading, the problem has never occurred. The connection is rock\nsolid. It seems to affect only the workstation.\n\nRecently when the "network cable is unplugged" message appeared I\ndecided to disable the 10/100 NIC and switch on the wireless card. It\nimmediately reported a successful connection and had been allocated\nthe correct IP reserved for the WG311v2 wireless card. However the\nconnection was totally dead (could not ping router). I tried to\nrepair the connection but it said "failed to renew IP address". I\ndisabled the WLAN card and went back to 10/100 card but this could\nonly obtain an IP address of 0.0.0.0 and therefore no network. So I\ndisabled it went back to the WLAN card, IP address fine, but\nconnection dead still. Several resets of the machine failed to\nresolve the problem. However powering up the laptop resulted in an\ninstantly successful live connection and even though the workstation\nwas at that time "connected" using the proper IP address for its own\nwireless card the router interface listed only one attached device -\nthe laptop. I therefore do not believe that the router is at fault\nsince blatently the wireless connection was available and working.\nAfter a few more resets and re-connection of the cable, disabling of\nthe WLAN card in the workstation and re-enabling of the 10/100 card a\nsuccessful connection was made.\n\nSince then I've never once been able to get a live connection using\nthe WLAN card in the workstation, even though it picks up the correct\nIP address each time. Since it is about to be moved to a new office\nand will ONLY have the wireless connection this is a problem I must\nsolve.\n\nSorry this is so long but I don't know where to look for the fault.\nThe router up time on LAN, WAN and WLAN runs into hundreds of hours so\nthere have been no drop outs there and connections with the laptop are\ntrouble free. Is it the workstation? If so, is it one problem or\nmore than one problem? The 3Com 10/100 is an old second hand one.\nThe Netgear WG311v2 has never really worked since I switched to\nWPA-PSK as the drivers only support WPA through WZC not through their\nown GUI which therefore has to be turned off. Unfortunately the WZC\nis crap and does not work well with the card - could it be that the\n10/100 is just knackered and the WLAN card is just not negotiating the\nnetwork security properly due to the problems with WPA - thereby being\ntwo seperate problem? Or is it something in Windows affecting all\nnetworking? Or the router? Aaargh!\n\nAny help appreciated - and desperately needed as it is holding up the\nmovement of equipment and this has further knock on effects.\n\nThe Equipment:\n\nNetgear DG834G adsl modem / router (f/w v1.05)\nProprietry PC running WinXP-Pro (SP1) with\nNetgear WG311v2 WLAN PCI card (f/w v1.017)\n3Com 10/100 LAN card (sorry don't know the model no)\n\nThe setup:\n\nWPA-PSK using 58 character key, includes mix of upper and lower case,\nplus numeric and ascii characters.\nMAC address filtering enabled.\nDCHP in use, although pool restricted to a limited no of addresses and\neach trusted MAC address has reserved IP address.\nSSID is switched on.\nWorkstation has auto updates turned on and runs NAV2003 and ZAv5\n(sorry, don't have the build no). It connects to the router via a\ncat5 cable connection.\n\nAlready done:\n\nOrdered new Belkin FD5000 10/100 LAN card.\nOrdered new Netgear WG311T WLAN card (which supports WPA-PSK in native\nGUI).\nTried disabling ZAv5 when connection dropped - no effect.