From harry at shoka.net Mon Aug 1 21:54:21 2005 From: harry at shoka.net (Harry Moyes) Date: Mon Aug 1 21:54:25 2005 Subject: [manchesterwireless] Extreme solutions... Message-ID: <1122929661.4772.326.camel@shoka.local.shoka.net> In case nobody is watching slashdot http://wwww.wifiworldrecord.com Now that's some shooting.. Harry From ged at jubileegroup.co.uk Tue Aug 2 20:52:38 2005 From: ged at jubileegroup.co.uk (G.W. Haywood) Date: Tue Aug 2 20:52:40 2005 Subject: [manchesterwireless] Extreme solutions... In-Reply-To: <1122929661.4772.326.camel@shoka.local.shoka.net> References: <1122929661.4772.326.camel@shoka.local.shoka.net> Message-ID: Hi Harry, On Mon, 1 Aug 2005, Harry Moyes wrote: > http://wwww.wifiworldrecord.com > > Now that's some shooting.. "Ping times varied from 0.01 ms to 400 ms, seeming to average around 10 ms." Hmmm... 250/186411 = 0.00134 ... How do you think he gets his signal to go faster than light? :) 73, Ged. From jgxhs at nessie.mcc.ac.uk Tue Aug 2 21:24:13 2005 From: jgxhs at nessie.mcc.ac.uk (John Greenwood) Date: Tue Aug 2 21:24:28 2005 Subject: [manchesterwireless] Extreme solutions... In-Reply-To: References: <1122929661.4772.326.camel@shoka.local.shoka.net> Message-ID: <5flve1hvcjf2urbn8ouu2o53iaho98o8b8@4ax.com> Come on Ged you know how this is done,,, It's with an interositor have you forgotten? John On Tue, 2 Aug 2005 20:52:38 +0100 (BST), you wrote: >Hi Harry, > >On Mon, 1 Aug 2005, Harry Moyes wrote: > >> http://wwww.wifiworldrecord.com >> >> Now that's some shooting.. > >"Ping times varied from 0.01 ms to 400 ms, seeming to average >around 10 ms." > >Hmmm... 250/186411 = 0.00134 ... How do you think he gets his signal >to go faster than light? :) > >73, >Ged. > >_______________________________________________ >ManchesterWireless mailing list >ManchesterWireless@lists.pointless.net >http://pointless.net/mailman/listinfo/manchesterwireless From ged at jubileegroup.co.uk Tue Aug 2 22:00:28 2005 From: ged at jubileegroup.co.uk (G.W. Haywood) Date: Tue Aug 2 22:00:31 2005 Subject: [manchesterwireless] Extreme solutions... In-Reply-To: <5flve1hvcjf2urbn8ouu2o53iaho98o8b8@4ax.com> References: <1122929661.4772.326.camel@shoka.local.shoka.net> <5flve1hvcjf2urbn8ouu2o53iaho98o8b8@4ax.com> Message-ID: Hi John, On Tue, 2 Aug 2005, John Greenwood wrote: > Come on Ged you know how this is done,,, > > It's with an interositor have you forgotten? Even if I hadn't, I wouldn't admit it. http://www.answers.com/topic/interocitor :) 73, Ged. > On Tue, 2 Aug 2005 20:52:38 +0100 (BST), you wrote: > ... > > How do you think he gets his signal to go faster than light? :) From jgxhs at nessie.mcc.ac.uk Tue Aug 2 22:18:55 2005 From: jgxhs at nessie.mcc.ac.uk (John Greenwood) Date: Tue Aug 2 22:19:01 2005 Subject: [manchesterwireless] Extreme solutions... In-Reply-To: References: <1122929661.4772.326.camel@shoka.local.shoka.net> <5flve1hvcjf2urbn8ouu2o53iaho98o8b8@4ax.com> Message-ID: full plans available here for eager builders if future WIFI installations. http://www.shipbrook.com/jeff/interocitor/ On Tue, 2 Aug 2005 22:00:28 +0100 (BST), you wrote: >Hi John, > >On Tue, 2 Aug 2005, John Greenwood wrote: > >> Come on Ged you know how this is done,,, >> >> It's with an interositor have you forgotten? > >Even if I hadn't, I wouldn't admit it. > >http://www.answers.com/topic/interocitor :) > >73, >Ged. > > > >> On Tue, 2 Aug 2005 20:52:38 +0100 (BST), you wrote: >> ... >> > How do you think he gets his signal to go faster than light? :) > > >_______________________________________________ >ManchesterWireless mailing list >ManchesterWireless@lists.pointless.net >http://pointless.net/mailman/listinfo/manchesterwireless From harry at shoka.net Tue Aug 2 23:11:41 2005 From: harry at shoka.net (Harry Moyes) Date: Tue Aug 2 23:11:45 2005 Subject: [manchesterwireless] Extreme solutions... In-Reply-To: References: <1122929661.4772.326.camel@shoka.local.shoka.net> Message-ID: <1123020701.4680.343.camel@shoka.local.shoka.net> On Tue, 2005-08-02 at 20:52 +0100, G.W. Haywood wrote: > > Hmmm... 250/186411 = 0.00134 ... How do you think he gets his signal > to go faster than light? :) I like the colourfully explanations better, but if you want a guess at the real cause try the following. Sadly this is a common instrumentation error. The timer resolution in the OS is limited, and there are two passes at least through the scheduling algorithm. submit ICMP frame to radio > > > Frame reaches target submit time stamp request to OS OS reschedules timestamp reply ^ response frame received < < < Target Responds submit time stamp request to OS OS reschedules ho hum doing something else timestamp reply ^ ^ error in reported transit time ^ Or the other way round........ submit ICMP frame to radio > > > Frame reaches target submit time stamp request to OS ho hum doing something else timestamp reply ^ response frame received < < < Target Responds submit time stamp request to OS OS reschedules timestamp reply ^ ^ ^ negative error in reported transit time At a resolution of tens of microseconds present standard Linux Kernels are struggling. Linux kernels usually report ping times in tenths of milliseconds. Most versions of windows only report ping times in whole milliseconds. Now with Ingo Molnars shiny new RT Linux patchset maybe you can get down to this sort of interval reliably..... Harry From ged at jubileegroup.co.uk Wed Aug 10 13:17:10 2005 From: ged at jubileegroup.co.uk (G.W. Haywood) Date: Wed Aug 10 13:17:18 2005 Subject: [manchesterwireless] More Extreme solutions... In-Reply-To: <1123020701.4680.343.camel@shoka.local.shoka.net> References: <1122929661.4772.326.camel@shoka.local.shoka.net> <1123020701.4680.343.camel@shoka.local.shoka.net> Message-ID: Hi all, "The airwaves belong to the public, not the highest bidder," said FCC Commissioner Jonathan Adelstein. in http://news.bbc.co.uk/1/hi/entertainment/music/4135762.stm Something of which the UK government might take note? 73, Ged. From Peter.Morris at astrazeneca.com Thu Aug 11 09:57:46 2005 From: Peter.Morris at astrazeneca.com (Morris, Peter R) Date: Thu Aug 11 10:02:02 2005 Subject: [manchesterwireless] More Extreme solutions... Message-ID: <77B8D39FB855D511B6FE0002A55C0CE6078DD7E4@ukcfphmsx01.ukcf.astrazeneca.net> bit like north sea oil then... > -----Original Message----- > From: G.W. Haywood [mailto:ged@jubileegroup.co.uk] > Sent: Mittwoch, 10. August 2005 13:17 > To: Manchester's Wireless Community Network discussion list > Subject: [manchesterwireless] More Extreme solutions... > > > Hi all, > > "The airwaves belong to the public, not the highest bidder," said FCC > Commissioner Jonathan Adelstein. > > in > > http://news.bbc.co.uk/1/hi/entertainment/music/4135762.stm > > Something of which the UK government might take note? > > 73, > Ged. > > _______________________________________________ > ManchesterWireless mailing list > ManchesterWireless@lists.pointless.net > http://pointless.net/mailman/listinfo/manchesterwireless > From dmgkebab at hotmail.com Fri Aug 12 09:15:48 2005 From: dmgkebab at hotmail.com (Donna Griffe) Date: Fri Aug 12 09:15:51 2005 Subject: [manchesterwireless] re: network access Message-ID: An HTML attachment was scrubbed... URL: http://lists.pointless.net/pipermail/manchesterwireless/attachments/20050812/8127665c/attachment.htm From ged at jubileegroup.co.uk Fri Aug 12 15:32:06 2005 From: ged at jubileegroup.co.uk (G.W. Haywood) Date: Fri Aug 12 15:32:08 2005 Subject: [manchesterwireless] re: network access In-Reply-To: References: Message-ID: Hi there, On Fri, 12 Aug 2005, Donna Griffe wrote: > network access in North Manchester? I see there is a node in > Crumpsall - maybe the nearest to me altho im unsure. Because radio waves at the wavelength used for radio networks travel more-or-less along lines of sight, it's not possible to know if you will be able to connect to any given node unless you can for example say something like "I can see it from my bedroom window". Sometimes even then it's necessary to do a little more work - things like other networks in the vicinity can interfere. A site survey is necessary to answer all the technical questions, sounds grand but it's really just a matter of someone with a bit of experience casting an eye over the lie of the land/buildings/trees and asking a few questions. > I live in the Blackley / Lower Crumpsall area, near Factory > Lane. Can you tell me if there is wireless network access here, and > if there is how do i go about joining to get it? Manchester Wireless wasn't necessarily formed with the intention of sharing Internet access over the ether, although a lot of people (including me) use radio networking almost exclusively for Internet access. AFAIK there's no, er, official ManchesterWireless policy on sharing access to the Internet, and the charity doesn't run nodes of its own. Not everyone with an access point will be willing to give a free ride to eveybody who can see it, so you'll need to get in touch with the owner to establish their policies. As you've seen the Manchester Wireless site is rather badly out of date. I think the nodes you're referring to in Crumpsall appear in the Consume website as 'speculative' but I don't know how up to date nor how accurate that will be. There's a node further north (Shoka) which might be possible. You'll have to talk to Harry, who set it up. He's a good man, and he reads the list, so I guess he'll chime in when he has time. > Im on NTL broadband at the present but want to ditch it I can understand that. :) 73, Ged. PS: Be aware that this list can be read by the public, you might want to be cautious about any personal information that you post. From harry at shoka.net Fri Aug 12 21:37:53 2005 From: harry at shoka.net (Harry Moyes) Date: Fri Aug 12 21:38:05 2005 Subject: [manchesterwireless] re: network access In-Reply-To: References: Message-ID: <1123879073.4134.233.camel@shoka.local.shoka.net> On Fri, 2005-08-12 at 08:15 +0000, Donna Griffe wrote: > > Dear all at Manchesterwireless, > > Dont know if the question has been answered directly on the website, > but i am after knowing if there is network access in North Manchester? > I see there is a node in Crumpsall - maybe the nearest to me altho im > unsure. > I think the website is substantially misleading, we have never attained the membership or interest to link up as a Manchester wide network. Changes have been discussed, but nothing concrete has emerged (yet). There are a number of very effective local nets, but nothing covering the Crupsall 'ole I'm afraid. (As Ged noted in his response wireless at this frequency goes in straight lines. And as I work down by the Irk, I've thought about how to cover that area off and on for a number of years, without coming to any conclusion other than its a pig from a wireless point of view) I'm over the hill from you on the other side of Higher Blackley, and again, as Ged pointed out, I'm not keen to offer unrestricted Internet access to passing strangers. (Cue Darrens dig about how many layers of Firewalling I run.) > I live in the Blackley / Lower Crumpsall area, near Factory Lane. Can > you tell me if there is wireless network access here, and if there is > how do i go about joining to get it? Im on NTL broadband at the > present but want to ditch it as its way too expensive for the service > i get. > Short answer is to the best of my knowledge there isn't any. Since down in't'ole you are on your own, possibly we can help you get a satisfactory broadband service, and maybe you could add some cover yourself. If its not too private, what are the issues you have with your current broadband supplier? From ged at jubileegroup.co.uk Wed Aug 24 11:36:23 2005 From: ged at jubileegroup.co.uk (G.W. Haywood) Date: Wed Aug 24 11:36:26 2005 Subject: [manchesterwireless] Using WRT54GS as access point Message-ID: Hi guys, Has anyone used the WRT54GS (running OpenWRT) as an access point with any of the PCI/PCMCIA wireless cards in Linux clients? I've had no luck in getting clients to associate using the Netgear MA311 cards, although I can get them to associate with other access points that I have kicking around, and with each other if I use one of them as an access point. The WRTs will work fine in WDS mode too. There's no trouble with the radio connections, the clients can scan for the WRT access points and report the information that they get, but they just refuse to associate. I've tried a message on the OpenWRT forum but seen no response so far. There's a lot more detail there - my post is (so far) at the bottom: http://openwrt.org/forum/viewtopic.php?id=1888 73, Ged. From taraar at yahoo.com Thu Aug 25 00:03:30 2005 From: taraar at yahoo.com (Adam) Date: Thu Aug 25 00:03:34 2005 Subject: [manchesterwireless] locust world mesh box nodes in rusholme and moss side Message-ID: <20050824230330.78216.qmail@web34513.mail.mud.yahoo.com> hi i am trying to setup three locust world nodes in the above area anyone with the expertise of fixing will be great help Send instant messages to your online friends http://uk.messenger.yahoo.com From harry at shoka.net Thu Aug 25 00:27:00 2005 From: harry at shoka.net (Harry Moyes) Date: Thu Aug 25 00:27:10 2005 Subject: [manchesterwireless] Using WRT54GS as access point In-Reply-To: References: Message-ID: <1124926020.28977.136.camel@shoka.local.shoka.net> On Wed, 2005-08-24 at 11:36 +0100, G.W. Haywood wrote: > Hi guys, > > Has anyone used the WRT54GS (running OpenWRT) as an access point with > any of the PCI/PCMCIA wireless cards in Linux clients? not tried recently. Have all the pieces, may get a chance to try it. Which rel of OpenWRT? Harry From ged at jubileegroup.co.uk Thu Aug 25 09:01:02 2005 From: ged at jubileegroup.co.uk (G.W. Haywood) Date: Thu Aug 25 09:01:08 2005 Subject: [manchesterwireless] Using WRT54GS as access point In-Reply-To: <1124926020.28977.136.camel@shoka.local.shoka.net> References: <1124926020.28977.136.camel@shoka.local.shoka.net> Message-ID: Hi Harry, On Thu, 25 Aug 2005, Harry Moyes wrote: > > Has anyone used the WRT54GS (running OpenWRT) as an access point with > > any of the PCI/PCMCIA wireless cards in Linux clients? > > not tried recently. Have all the pieces, may get a chance to try it. > > Which rel of OpenWRT? According to http://controlap.com/loader.htm http://downloads.openwrt.org/experimental-20050525/bin/openwrt-wrt54gs-squashfs.bin (note: open wrt is updating frequently so please use the "experimental" builds as dated above and not the "white russian" builds or RC builds since those have introduced new bugs such as enabling WEP when it shouldn't be.) so that's what I first grabbed for these boxes. The installation was a bit different from the version I used in Scotland. I ran into some problems, which now I think were mostly because these new routers are version 1.1 hardware. During the process of trying to figure out what was wrong I tried openwrt-wrt54gs-jffs2.bin from the same directory as noted above and stuck with it as it seemed to be easier to install and WDS worked OK. It might not have been the right move but I don't want to change it now since _almost_ everything seems to be under control. With this version you get ssh without having to download anything with ipkg, but you have to reboot after the newly-installed package boots for the first time because it comes up with a read-only partition. Otherwise it installed very easily (once I'd got the hang of it on the new LinkSys, no mucking about with flood pings...:) 73, Ged. From adam at adamchallis.co.uk Thu Aug 25 13:59:40 2005 From: adam at adamchallis.co.uk (Adam Challis) Date: Thu Aug 25 13:59:38 2005 Subject: [manchesterwireless] locust world mesh box nodes in rusholme andmoss side In-Reply-To: <20050824230330.78216.qmail@web34513.mail.mud.yahoo.com> Message-ID: Hi, I live in the moss side area. Just out of curiosity - are you running these as a not for profit scheme, or as a company? Adam Challis -----Original Message----- From: manchesterwireless-bounces+adam=adamchallis.co.uk@lists.pointless.net [mailto:manchesterwireless-bounces+adam=adamchallis.co.uk@lists.pointless.ne t] On Behalf Of Adam Sent: 25 August 2005 00:04 To: manchesterwireless@lists.pointless.net Subject: [manchesterwireless] locust world mesh box nodes in rusholme andmoss side hi i am trying to setup three locust world nodes in the above area anyone with the expertise of fixing will be great help Send instant messages to your online friends http://uk.messenger.yahoo.com _______________________________________________ ManchesterWireless mailing list ManchesterWireless@lists.pointless.net http://pointless.net/mailman/listinfo/manchesterwireless From taraar at yahoo.com Fri Aug 26 12:38:25 2005 From: taraar at yahoo.com (Adam) Date: Fri, 26 Aug 2005 12:38:25 +0100 (BST) Subject: [manchesterwireless] locust world mesh box nodes in Rusholme and Moss side In-Reply-To: Message-ID: <20050826113826.78942.qmail@web34506.mail.mud.yahoo.com> this r not for profit so if you live around the Great Western and princess rd or near the wit worth park you will be able to enjoy for free. do you know anything about the mesh networks? ___________________________________________________________ Yahoo! Messenger - NEW crystal clear PC to PC calling worldwide with voicemail http://uk.messenger.yahoo.com From grimoire at sparky.ox.compsoc.net Tue Aug 30 21:02:57 2005 From: grimoire at sparky.ox.compsoc.net (Dave Page) Date: Tue, 30 Aug 2005 21:02:57 +0100 Subject: [manchesterwireless] Effective Radiated Power? Message-ID: <20050830200257.GC6402@antipode.bike-shed.org.uk> Can anybody point me to some reliable documentation about Effective Radiated Power calculations? Some things I've read suggest that it's just a matter of adding the transmitter power to the gain of the transmitting antenna; others suggest that that only applies to omnidirectional aerials and it's different if you use directional ones, which I'm planning on doing. I've spent about a fortnight researching this and am just beating my head against a brick wall now. I think that rather than trying to wirelessly network two properties, I'm just going to get a second ADSL line and use VPN over it. If anybody fancies casting an eye on http://www.livejournal.com/users/diffrentcolours/584492.html and offering any advice, I'd be very grateful. Dave -- "A blackened shroud, a hand-me-down gown of rags and silks, a costume fit for one who sits and cries for all tomorrow's parties" - The Velvet Underground -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: Digital signature Url : http://pointless.net/pipermail/manchesterwireless/attachments/20050830/14c142ab/attachment.bin From hick.w.manchester at gink.org Wed Aug 31 09:47:38 2005 From: hick.w.manchester at gink.org (gARetH baBB) Date: Wed, 31 Aug 2005 09:47:38 +0100 (BST) Subject: [manchesterwireless] Effective Radiated Power? In-Reply-To: <20050830200257.GC6402@antipode.bike-shed.org.uk> References: <20050830200257.GC6402@antipode.bike-shed.org.uk> Message-ID: On Tue, 30 Aug 2005, Dave Page wrote: > line and use VPN over it. If anybody fancies casting an eye on > http://www.livejournal.com/users/diffrentcolours/584492.html and > offering any advice, I'd be very grateful. I think you've immersed yourself in so much minute detail you've come to a position where you can't see the wood for the trees. Just get a test setup going and see how it performs, and adjust as neccessary. I will point out one thing, by default HostAP does not use a max TXPOWER, it lets the card firmware do ALC - badly IMO. Unfortunately you can't just disable ALC and ramp the TXPOWER up to full, well you can and it lets you see what is possible, but in my experience at some point the TXPOWER will suddenly plummet to 0 until you reset - there is some conflict going on somewhere. Also if HostAP has to reset the card for some reason then the ALC and TXPOWER settings are set back to default. There is at least one patch to cater for this, but I think it's out of date now, and still missed a few points. Use a simple AP, this avoids all of this nastiness, and also means you can run Cat5 from whatever to the AP and more importantly the AP can be sitting right next to your antenna. From ged at jubileegroup.co.uk Wed Aug 31 09:50:25 2005 From: ged at jubileegroup.co.uk (G.W. Haywood) Date: Wed, 31 Aug 2005 09:50:25 +0100 (BST) Subject: [manchesterwireless] Effective Radiated Power? In-Reply-To: <20050830200257.GC6402@antipode.bike-shed.org.uk> References: <20050830200257.GC6402@antipode.bike-shed.org.uk> Message-ID: Hi there, On Tue, 30 Aug 2005, Dave Page wrote: > Can anybody point me to some reliable documentation about Effective > Radiated Power calculations? Some things I've read suggest that it's > just a matter of adding the transmitter power to the gain of the > transmitting antenna; others suggest that that only applies to > omnidirectional aerials and it's different if you use directional ones, > which I'm planning on doing. ETSI 300-328. But don't go there, there are dragons. AFAICT you're already under something of a misconception. An omni IS directional (otherwise it couldn't give you any gain:) but it's directional in the sense that a diagram of the radiated power looks like a doughnut. Yes, you should keep your output to 100mW (or 20dBm) EIRP but I've yet to see any reliable way of measuring it and I've never heard of anyone being taken to task for emitting a few milliwatts into a 15dBi Yagi at 2.4GHz. Now if you talk to Darren I'm sure he'll have some stories... Incidentally dBi means referred to a fictitious isotropic radiator (think lightbulb) whereas dBm means referred to a miliwatt. Sheesh. So 20dBm means that 10 * log(ratio) = 20. That means log(ratio) = 2. Or in English, that means 100 times since the logarithm of 100 is 2. These are logarithms to the base ten of course. Dunno if they do this in schools any more. > I think that rather than trying to wirelessly network two > properties, I'm just going to get a second ADSL line and use VPN Having had some experience of the kind of problems that you can run into with radio links I wouldn't necessarily argue with that, but let's talk about it first. > If anybody fancies casting an eye on > http://www.livejournal.com/users/diffrentcolours/584492.html and > offering any advice, I'd be very grateful. "Finding a robust solution to this is also important" Then I think you should seriously consider Linux boxes, even if it's only for the links. It's a bit flakey, particularly between floors, but I've not been able to work out why - I'd suspect interference or just a lack of vertical signal strength in the built-in omnis Think polarization. Try moving the kit around - particularly rotating it, since the stuff probably was not designed to work in a lift shaft, or try a different way of doing it, such as using separate antennae. Or access points which permit the connection of external antennae. It really is a case of experimenting, with some thought applied to the experiments (which is obviously one of your strong points:). I am assuming that the building frame of Zen will also block wifi signals much as the one at Old Skool Daze does Wild assumption. Using WRT54GS boxes with the supplied whip antennae, I can easily get a 50metre link when the WRTs are inside two aluminium portakabins on either side of a steel-framed shed. At the wireless protocol level, I'm looking at switching from the ad-hoc network to one revolving around an access point, running off a Linux server at Old Skool Daze wired to the external aerial. Oh, you _are_ considering Linux boxes. Good man. I've used hostap for about three years and it does the job just fine. I'm thinking of doing away with IPSec, and using VPN instead. I've used OpenVPN for a couple of years. For communication between Derbyshire in England and Languedoc-Roussillon in France I use VOIP over OpenVPN/UDP with good results through, inter alia, two access points and three IPCop firewalls (two of which are wireless clients). I run probably twenty or thirty ssh sessions (one of them is writing this mail) and a number of other network applications concurrently. It all works fine unless there's a lot of snow on the aerials. It's too easy to imagine dragons. Often when a link doesn't work as well as was hoped you start to think about all the unfathomable things when in fact it's the fathomable ones that are causing the problems. Radio waves can get here from distant galaxies fercryinoutloud, I'm sure they'll make it up the street. It's just what you do with them next that matters. FWIW I wonder if you might be better off using something like Yagis for your 220m link, since you suspect that there might be interference. I suspect you're probably right, but in my experience interference isn't likely to be a big issue. Take a look at the little plastic box up the tower in http://www.jubileegroup.co.uk/radio/tower.html There are two access points in the box, about 40metres away from my desk at 45 degrees to the horizontal. From the wireless card in the PC on my desk I'm able to choose which of the access points that I connect to. Clearly they aren't interfering much with each other. This would also mean that we could offer public wifi access to non-VPN-authenticated clients, which would be nice. Check on the legality of what you're planning there. so basically I need to match the impedance of the card, the cable and the aerial? ... it's been bloody ages since I did this AC stuff. Don't worry about it unless you start building your own. All the kit you'll be buying will have the same characteristic impedance (50 Ohms, give or take) unless you start getting creative with satellite stuff. Most coax at 2.4 Ghz is hugely lossy, so keep the RF cables as short as possible. Good advice. Very good. I use RG213 in lengths of 5-8 metres but I wouldn't recommend it. The main reasons I use it are that it's cheap and easy to terminate. If you have LMR400 then that's great, if it's terminated well you can more or less forget about it. I've seen some pretty terrible terminations done 'professionally' (by which I mean it cost me money) and now I do them all myself. FWIW I'd trust Harry. :) An old satellite dish will probably give you more gain than an expensive yagi. True enough. But it might not have the right impedance and it will be a bitch to point it in the right direction. ---------------------------------------------------------------------- Executive summary: Measure things. Make sure all the bits are doing what you think they should be doing. Write it all down in a book. Draw pictures. It will take time, but from what I've seen you'll get the hang of it. 73, Ged. From ged at jubileegroup.co.uk Wed Aug 31 10:29:18 2005 From: ged at jubileegroup.co.uk (G.W. Haywood) Date: Wed, 31 Aug 2005 10:29:18 +0100 (BST) Subject: [manchesterwireless] Using WRT54GS as access point In-Reply-To: <1124926020.28977.136.camel@shoka.local.shoka.net> References: <1124926020.28977.136.camel@shoka.local.shoka.net> Message-ID: Hi Harry, On Thu, 25 Aug 2005, Harry Moyes wrote: > On Wed, 2005-08-24 at 11:36 +0100, G.W. Haywood wrote: > > > > Has anyone used the WRT54GS (running OpenWRT) as an access point with > > any of the PCI/PCMCIA wireless cards in Linux clients? > > not tried recently. Have all the pieces, may get a chance to try it. Eureka! I think. I had set wl0_ssid but not wl0_ap_ssid. Works now. I need to check that nothing else which I've changed might affect it, but I'm pretty sure that was the problem. If there's one thing I'd criticize in OpenWRT it's that it seems there are many, many unused variables cluttering up the NVRAM. When you're trying to get a setup working it's very time-consuming trying to work out which ones to set and which to ignore. AFAICT wl0_ap_ssid isn't mentioned in the OpenWRT documentation. In a full text search on the Wiki this morning there were seven hits for wl0_ssid and none at all for wl0_ap_ssid. 73, Ged. From ged at jubileegroup.co.uk Wed Aug 31 11:21:10 2005 From: ged at jubileegroup.co.uk (G.W. Haywood) Date: Wed, 31 Aug 2005 11:21:10 +0100 (BST) Subject: [manchesterwireless] Using WRT54GS as access point In-Reply-To: References: <1124926020.28977.136.camel@shoka.local.shoka.net> Message-ID: Hi Harry, On Wed, 31 Aug 2005, G.W. Haywood wrote: > Eureka! I think. I had set wl0_ssid but not wl0_ap_ssid. Works now. > I need to check that nothing else which I've changed might affect it, > but I'm pretty sure that was the problem. Hmmmm. Looks like I need wl0_gmode=0 as well. When set to 2 the client doesn't seem to want to associate with it. 73, Ged. From ged at jubileegroup.co.uk Wed Aug 31 11:45:20 2005 From: ged at jubileegroup.co.uk (G.W. Haywood) Date: Wed, 31 Aug 2005 11:45:20 +0100 (BST) Subject: [manchesterwireless] Using WRT54GS as access point In-Reply-To: References: <1124926020.28977.136.camel@shoka.local.shoka.net> Message-ID: Hi Harry, On Wed, 31 Aug 2005, G.W. Haywood wrote: > Hmmmm. Looks like I need wl0_gmode=0 as well. In fact now I find that wl0_ap_ssid isn't the culprit at all, I've unset it and can still use the AP. It must have been wl0_gmode all along. 73, Ged.