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Article #453limited 802.11b range, SMC WAP/USR client, multiple WAPS, 802.11a as an alternative?
From: Gary Funck
Date: Mon, 29 Apr 2002 16:16
Date: Mon, 29 Apr 2002 16:16
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This past weekend, I bit the bullet and decided to add wireless capability to my home network. I bought a laptop (Toshiba), and then went to Fry's and picked up some wireless stuff: SMC7004AWBR - 4 port router/firewall, 802.11b WAP, with printer server USR2410 - US Robotics 802.11b PCMCIA (client) card I looked at 802.11a stuff, but was unwilling to pay $400-$500 more for the privilege of trying out the latest technology. They didn't have the Lucent/Orinoco 802.11b PC card. The salesman said he thought the USR was a good card, and since I had no clue, I bought that one. I have heard that the USR card may use a new TI chipset, to implement 802.11b, but don't know if that is bad/good. Now the fun begins: - set up the WLAN (SMC) router: Not too difficult, except I had to switch everything over from fixed IP to DHCP, and since I have 7 fixed IP's I'd kinda preferred to keep things the way they were. Can't even connect to the WLAN router unless you use DHCP (connects on one of those funny local IP addresses). They say I can put things back to fixed IP, but I haven't spun up the CD with documentation to see how to do that. My initial attempts failed. - the USR PC card was more problematic. It seems the out-of-the-box driver does *not* support XP. Worse, the "configuration utility" deep sixes, causing Windows XP to "go blue" with the BSOD (Blue Screen of Death). As if that's not bad enough, subsequent reboots would sporadically crash the system (probably due to the faulty driver, I was never quite sure - it seemed to be worse if the card was removed before rebooting). - a quick trip to USR's web page yields some encouraging information: (1) yes, the config. utility doesn't work on XP, and yields "unpredictable results" (nice euphemism). Further, the new "1.28" driver for Win2K is supposed to work on XP, but was only tested on the initial release of XP, and "might not" work on later versions of XP. Then, there is the newer "1.30 BETA" driver which is intended for XP, but USB offers the driver as is, and offers no guarrantees it will work at all. Very comforting. Oh, the 1.28 driver comes in two flavors: "ad hoc" and "infrastructure", which has something to do with whether it roams or not, I think, but very little explanation is given. - so, I chose Door #2: the 1.28 'ad hoc' driver (the BETA tag scared me off a bit). Installation isn't all that easy -- you have to first un-install the old driver using the XP driver uninstall (it took me a while to find that, since XP is just enough different from Win2k to be irritating), and *then* you have to run a little utility, downloaded separately, that *really* uninstalls the driver (nice). Okay, new 1.28 driver installed, after much frustration, I determine it just won't talk to the wireless transmitter. (I made sure they were using the same wireless channel, no encryption, etc.) - next, I downloaded the BETA driver. The good news is this driver comes with a web page that directs the user through the uninstall steps, and even includes the uninstall utility with the same down load. Still no config. utility, and I think that may mean that encryption can't be turned on, but I haven't explored that area yet. Well, the good news is that the BETA driver works(!). - now the bad news: with the laptop about 6 feet from the transmitter, I'm seeing signal strength of about 80%, and "link quality" oscilating between 90-100%, and dropping to 80%. Okay, not so bad - but if I take the computer upstairs (40 feet, max.) the signal strength drops to 30-40%, and unless the card is oriented just right, the signal strength and link quality drop to zero(!). So much for the advertised 300 feet max. I tried moving the transmitter away from the DSL router and computer, but this didn't change things. The walls are thick here, and maybe there's chicken wire under the plaster/lathe, but really shouldn't I expect better performance? How do I know if the transmitter and receiver are working according to spec? Do wireless phones (just sitting in their cradles) or wireless mice interfere with these things? What next? The current situation isn't workable. I really expected to be able to use the wireless connection upstairs, and in the living room, or even outside. Right now, anything more than 15-20 feet (line of sight) away looks marginal. I see a few possiblities: 1) some other combination of WAP and PC client - but which ones, and why would they work better? I've read that the SMC is about as good as it gets for reasonably priced WAP's, so perhaps the only thing to try is a new unit. I tried out a friend's Orinoco Gold USB client, and it did work a bit better (and maybe even works well enough for my application, at the margin), so I'm going to try that next. 2) somehow increase the effectiveness of the PC client's antenna. I don't see any place on the PC card to plug in a piece of wire though. 3) Multiple WAPS: get another wireless "access point". This can be a non-router, and might cost $125/so (just guessing). How do I configure that? On the same channel,or a different one? How does DHCP work in that setting (note: I'd position it upstairs, because upstairs and downstairs are connected by CAT5). I'm thinking that I'd configure the upstairs WAP to use a different channel (and let the client roam to find the strongest), disable DHCP, and connect the WAP to my local ethernet line using a cross-over cable, (connecting it to the WAN port). Anyone tried this? will this work? 4) Spend the additional $400 and go with 802.11a. Is it reasonable to assume that if 802.11a is faster, that it will more reliably transmit/receive on weaker singals? Maybe I won't see 72Mbs, but at least I'll see decent ability to connect/transmit? I overhead some customers at Fry's saying 802.11a was evem more sensitive to interference, and couldn't tansmit as far, btw. I assume they were talking about transmitting at full speed but who knows? ---- I'd appreciate hearing you thoughts/suggestions. thanks - Gary
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 104fd2,64500d3ffd523aad,start X-Google-Attributes: gid104fd2,public X-Google-Thread: fa874,64500d3ffd523aad,start X-Google-Attributes: gidfa874,public X-Google-ArrivalTime: 2002-04-29 09:15:54 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!hub1.nntpserver.com!hub1.meganetnews.com!sjc-peer.news.verio.net!news.verio.net!sea-read.news.verio.net.POSTED!not-for-mail From: "Gary Funck" <gary@intrepid.com> Newsgroups: alt.internet.wireless,ba.internet Subject: limited 802.11b range, SMC WAP/USR client, multiple WAPS, 802.11a as an alternative? Lines: 113 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Message-ID: <hlez8.20474$Yb1.48036@sea-read.news.verio.net> Date: Mon, 29 Apr 2002 16:16:13 GMT NNTP-Posting-Host: 64.173.57.250 X-Complaints-To: abuse@verio.net X-Trace: sea-read.news.verio.net 1020096973 64.173.57.250 (Mon, 29 Apr 2002 16:16:13 GMT) NNTP-Posting-Date: Mon, 29 Apr 2002 16:16:13 GMT Organization: Verio