900MHz is less affected by trees and water than 2.4GHz, though can be more affected by metal-framed buildings. The company claims non line of sight too. They suggest that with LOS, coverage is 6 miles to an outdoor antenna, or 3 miles to a window-mounted antenna. And without LOS, it's 2 miles / 1 mile.
I expect that is with the central site antenna on a well-sited tower. Since the equipment is running at around 900MHz a lot of commercial equipment available is available (antennas, amplifiers) for operating cellular base stations which would also be useful here.
I would have expected a bigger difference between the range for outdoor and indoor installation, but reading further down the FAQ explains why - it's due to timing of the protocol. (They use a polling system to allocate air time, so the timing requirements that restrict the range are probably chosen to allow enough concurrent users).
All they say about security is this,
WaveRider has developed its own protocol that is optimized for outdoor long-range use, high performance and the ability to continue operating in environments with interference. By not supporting 802.11b interoperability, the system is much more secured.
which probably raises the bar enough to stop most people - the average user of Netstumbler, etc, won't find anything. And the fact that the CPE units act as routers not bridges means you probably won't find much by running tcpdump on the interface associated with their kit.
But unless there's strong encryption as well, someone who is resourceful and determined wouldn't be put off. So it all depends who you want to hide your traffic from;)
Not bad, but it's certainly no Cambridge Broadband...
The power should be going up with the new noncommercial (BBC/Crown Castle) license, though it remains to be seen if they'll get enough bandwidth to have respectable video quality on at least the main channels...that's one area Murdoch has quite an advantage.
Pity C5 broadcast on terrestrial analogue really, I think terrestrial digital would be doing a lot better now if they'd had some extra capacity to play with. (And I really think they should have arranged to put VGA connectors on the set-top boxes too, I'm sure they'd have sold a lot more).
Would be nice to get everything changed over once and for all so that the license fee doesn't have to be spent on maintaining two transmission systems and chasing up non-payers, and can be redirected to either programming, cost reductions or getting an internet multicast service up and running (I'm sure there are a *lot* of people worldwide who would be happy to pay a license fee to be able to watch BBC which would boost revenue too...). And making sure the Kingswood Warren techs are happy!
(Oh, before someone pipes up about how evil license fees are, don't knock them unless you've had the chance to watch quality TV without commercials!)
Since the D-60 (around $2200 for the body) came out, the second hand market for the D-30 must be a little better than it used to be and even without using Genuine Fractals or SI Pro you can still output to fairly decent sizes from the dpi it captures...
You can review shots before you print using a film SLR, but it's not very convenient. (for example, just have films developed but not printed, which is usually quite cheap for negs, and use a film-scanner - the difference in price between a film SLR and digital SLR plus memory will buy a reasonable scanner and a lot of film - depends what you're after really).
Software RAID is evil. It is too unpredictable. Use a good quality (read Adaptec) SCSI RAID controler,
If the data is really important, running software mirroring might actually be a very good idea, since it lessens the effect of a controller going bad. For RAID5 software is fairly evil though:)
That's not bad if you keep the number of drives down...240Gb on a system if you use two RAID cards with a 2-drive stripe-set on each and software-mirror between them...(RAID5 would usually be a bad move without hardware and battery-backed cache).
Apple are using ATA RAID on Xserve (one controller per drive), btw.
It's usually an option in the motherboard BIOS setup - maybe something like 'PDC20276 mode' with options of ATA or RAID. Setting to ATA should stop the Promise BIOS from initting.
It's not really cost effective for connections to the office, etc, unless you have an absolutely huge number of employees. In most cases for smaller companies MetroVPN is about the only way (though if everyone's same-exchange and close, roll-your-own G.SHDSL over EPS9 circuits may do the trick, works better if you can rent space close to the phone exchange for the central site).
Last I heard, only one company had actually done so, and only at a couple of exchanges
Easynet, but not for consumer grade yet, they want to recoup some costs first I guess. They are doing up to 8Mbps ADSL though. And I think SDSL too. More than a few exchanges, but nowhere near as many as BT.
The Squid+delay-pools someone suggested maybe viable as well (or there's Oops, another web cache which can run in reverse mode which does bandwidth limitation, I usually prefer it over Squid but haven't tried pushing it particularly hard).
Zeus really is great, it has some wonderful clustering features too, admin for the whole cluster can be done from one place. At the very least it's worth taking a look at the 30-day trial version to get an idea for how much work it would be to port the scripts across.
On a large site, you'll quite likely save the license cost by the decreased use of resources.
(AOLServer is a good server too, though it doesn't have the nice admin of Zeus there's a lot it can do and is also very efficient. I'm not sure whether it can throttle bandwidth by itself though).
Fewer players work well, less material can fit on a disc. VCD isn't really that terrible, especially if you're either watching it from a distance or on a small-ish screen. Obviously doesn't work so well for a large-screen home theatre system, but I don't think you'll see too many of them used primarily for educational material. With the problems of SVCD it might actually be better to wait for MPEG4 hardware..
SSL can always be unpacked, examined/modified and repacked by the proxy servers. (I know that you can tell it's been done, but that's beside the point).
Re:possibly stupid question about Klez's appearanc
on
Klez: a closer look
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· Score: 1
Yep this is quite common. And a lot of the time the stupid virus scan reports don't include the headers. Absolutely useless...
Qwerty is designed so that typewriters don't jam (by not using adjacent type hammers one after another). This is not the same thing as alternating hands on the keyboard.
PC-Write (a great DOS word processor) let you press `, a letter and an accent-type key (like ^ ' ` c ~ - ") to generate the symbols...very easy to remember and you didn't really need to look anything up to find a combination you don't yet know, you just look at the keyboard for the key with the most similar appearance.
You can change to the Dvorak layout remarkably easily even if you're very used to your current layout. One of the things about dv is that it's really easy to learn... 3-4 weeks and you should be able to achieve a fairly decent speed on Dvorak (particularly if you don't have to switch to qwerty much while you're doing it).
While you're learning, if you're typing english (rather than code) and can't find the letter quickly, start by looking at the opposite side of the keyboard to the last letter you typed.
I wouldn't say it's *faster* as such, just more comfortable. Though I'm still having a couple of problems getting the correct vowels (particularly o and e).
In windows, the position of ^x ^c ^v and ^w is a bit of a problem, if you have a mouse/trackball with extra buttons that can be mapped to copy/paste etc you might well find yourself using them (obviously not such a problem for X users).
Ha, I just realised how difficult it is to type the word 'qwerty':)
It's safer to use some fibre if it's run outdoors. Though just a short fibre section with media converters will do nicely (100mb converters are usually pretty cheap compared to the cost of replacing lightning-damaged PCs:)
I found it much faster to login to ssh.com's software than OpenSSH on old (486) hardware. And it often improves security to have diversity in software.
Bit of a niche, admittedly, but still worth mentioning I thought. And it seems some people are under the impression that the ssh.com version still costs money for all commercial use no matter what the OS. (I think that it used to - the license seems to change every so often).
Slashdot Mirror
I expect that is with the central site antenna on a well-sited tower. Since the equipment is running at around 900MHz a lot of commercial equipment available is available (antennas, amplifiers) for operating cellular base stations which would also be useful here.
I would have expected a bigger difference between the range for outdoor and indoor installation, but reading further down the FAQ explains why - it's due to timing of the protocol. (They use a polling system to allocate air time, so the timing requirements that restrict the range are probably chosen to allow enough concurrent users).
All they say about security is this,
which probably raises the bar enough to stop most people - the average user of Netstumbler, etc, won't find anything. And the fact that the CPE units act as routers not bridges means you probably won't find much by running tcpdump on the interface associated with their kit.But unless there's strong encryption as well, someone who is resourceful and determined wouldn't be put off. So it all depends who you want to hide your traffic from ;)
Not bad, but it's certainly no Cambridge Broadband...
Pity C5 broadcast on terrestrial analogue really, I think terrestrial digital would be doing a lot better now if they'd had some extra capacity to play with. (And I really think they should have arranged to put VGA connectors on the set-top boxes too, I'm sure they'd have sold a lot more).
Would be nice to get everything changed over once and for all so that the license fee doesn't have to be spent on maintaining two transmission systems and chasing up non-payers, and can be redirected to either programming, cost reductions or getting an internet multicast service up and running (I'm sure there are a *lot* of people worldwide who would be happy to pay a license fee to be able to watch BBC which would boost revenue too...). And making sure the Kingswood Warren techs are happy!
(Oh, before someone pipes up about how evil license fees are, don't knock them unless you've had the chance to watch quality TV without commercials!)
You can review shots before you print using a film SLR, but it's not very convenient. (for example, just have films developed but not printed, which is usually quite cheap for negs, and use a film-scanner - the difference in price between a film SLR and digital SLR plus memory will buy a reasonable scanner and a lot of film - depends what you're after really).
Mylex also make some nice RAID kit, btw.
Apple are using ATA RAID on Xserve (one controller per drive), btw.
It's usually an option in the motherboard BIOS setup - maybe something like 'PDC20276 mode' with options of ATA or RAID. Setting to ATA should stop the Promise BIOS from initting.
It's not really cost effective for connections to the office, etc, unless you have an absolutely huge number of employees. In most cases for smaller companies MetroVPN is about the only way (though if everyone's same-exchange and close, roll-your-own G.SHDSL over EPS9 circuits may do the trick, works better if you can rent space close to the phone exchange for the central site).
Zeus really is great, it has some wonderful clustering features too, admin for the whole cluster can be done from one place. At the very least it's worth taking a look at the 30-day trial version to get an idea for how much work it would be to port the scripts across.
On a large site, you'll quite likely save the license cost by the decreased use of resources.
(AOLServer is a good server too, though it doesn't have the nice admin of Zeus there's a lot it can do and is also very efficient. I'm not sure whether it can throttle bandwidth by itself though).
Fewer players work well, less material can fit on a disc. VCD isn't really that terrible, especially if you're either watching it from a distance or on a small-ish screen. Obviously doesn't work so well for a large-screen home theatre system, but I don't think you'll see too many of them used primarily for educational material. With the problems of SVCD it might actually be better to wait for MPEG4 hardware..
Or the first side, on 5 1/4s, the dust collecting inside the disk would often get knocked out when it's spinning the eother way...
Binaries for windump and analyser here (Analyser is a very nice gui for Windows packet capture).
SSL can always be unpacked, examined/modified and repacked by the proxy servers. (I know that you can tell it's been done, but that's beside the point).
Yep this is quite common. And a lot of the time the stupid virus scan reports don't include the headers. Absolutely useless...
I think the SMTP sender address is usually correct.
There's a good commentary on the Liebowitz article here.
Once you've learned the layout, you don't really need to be able to see the letters on the keycaps. (though it _is_ very helpful while you learn!)
I guess it would suck for shell coding though!
While you're learning, if you're typing english (rather than code) and can't find the letter quickly, start by looking at the opposite side of the keyboard to the last letter you typed.
I wouldn't say it's *faster* as such, just more comfortable. Though I'm still having a couple of problems getting the correct vowels (particularly o and e).
In windows, the position of ^x ^c ^v and ^w is a bit of a problem, if you have a mouse/trackball with extra buttons that can be mapped to copy/paste etc you might well find yourself using them (obviously not such a problem for X users).
Ha, I just realised how difficult it is to type the word 'qwerty' :)
yes, this is a very original way to have details of your new release posted on /. (:
It's safer to use some fibre if it's run outdoors. Though just a short fibre section with media converters will do nicely (100mb converters are usually pretty cheap compared to the cost of replacing lightning-damaged PCs :)
Because they'd cost about the same, so you might as well get the added speed of just using the faster tracks on a larger drive.
You mean back in the days where to get free email, you had to put the recipient's address in the "From:" field and send it to an invalid address?
Bit of a niche, admittedly, but still worth mentioning I thought. And it seems some people are under the impression that the ssh.com version still costs money for all commercial use no matter what the OS. (I think that it used to - the license seems to change every so often).
Fwiw, the ssh.com server isn't any more expensive than OpenSSH for (Free|Open|Net)BSD or Linux, as long as you compile it yourself.