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Ethernet Over Assorted Materials
saridder writes: "Cisco has demonstrated their latest last mile technology,
and not only can you now have 10 MB Ethernet over Cat3, Cat2, Cat1, try lamp
power cord, battery jumper terminals, barbed wire, etc. This may have solved the last mile problem, and at 10 MB, it blows DSL out of the water."
I hope that this technology can help me get away from @Home er, ATT...
Moderation: Put your hand inside the puppet head!
I taped a message to my cat... he walked the last mile - eventually - to my neighbors. It is a REAL slow way to play Diablo...
"If you are on fire you can just stop, drop, and roll. If you fall into Lava you are just dead." - my 5yr old daughter
Can it work over 2 tin cans and a piece of string?
----- Whats wrong with this picture? http://www.revoh.org:1234/whatswrong
Didn't anybody else catch the obvious [Technical Leader] Hugh Barrass==Huge Bareass?
This is clearly a hoax.
Any sufficiently well-organized community is indistinguishable from Government.
Does this mean we're getting closer to bein able to wire mp3s lightning fast on a tin can system? :D
I think it is just short of a mile, thus the technology is nothing more than hype. It is the last 20 miles that need to be addressed not the last 5000 ft.
Got Code?
The article doesn't go into details, but it sounds to me like it's just extended range HomePNA. Did I miss something?
Is it just me, or did anyone else think "huge bare ass" when they saw "Hugh Barrass" in this article?
Actually, I was trying to be Insightful, not Funny.
The problem is money. Nobody wants to spend the dollars necessary to hook us all up with data cable. That's why all the hullabalo about cable ISPs and DSL--they both utilize an existing physical connection.
In other words, the answer will not come from Cisco, it will come from somebody with deep pockets. And the only pockets deep enough in this case belong to the federal government.
324006
this has run up to 5 kfeet, if you read the article end to end... which will affect the answers for the CCNA one of these days real soon now... but doesn't help anybody in their home get broadband speeds from any telco, CLEC, cable, what have you. unless you live in the shadow of the CO, this doesn't replace DSL or cable at all. DSL under DMT can go up to 17 kfeet dependent on the usual phase of the moon issues...
if this is supposed to be a new economy, how come they still want my old fashioned money?
Yeah, barbed wire providing high bandwidth service to the ever popular Mobile COWs.
^_^
Hey, I just went out and bought a spool of barbed wire, only to discover that Cisco hasn't yet developed Ethernet-over-barbed-wire technology.
I guess I'll just have to reattach the alligator clips for my Ethernet-over-city-sewer connection.
That's "Mr. Soulless Automaton" to you, Bub.
"By offering Ethernet-like speeds over regular phone wire, at reaches up to 5,000 feet, and co-existing with phone traffic, LRE brings rich, advanced services such as next generation video-on-demand to places it has not gone before."
So, once again, 90% of the population is too far from the CO for this to bring broadband into the home.
The problem isn't the last mile, contrary to the buzzwords... the problem is getting the pipe to run many, many miles to actual end users' homes.
This will work until it goes through the 1st phone switch/filter. 5,000 ft really doesn't cover alot of ground, except perhaps in some office buildings, but who really knows how those buildings were wired.
Cisco spokesperson "Hugh Barrass"? Yeah, wait for the Ethernet-over-Jell-O(tm) Puddin' Pops protocol called "IP Freely"...
Carousel is a lie!
isn't MB=Megabyte and Mb=Megabit?
not to be a prick or anything.
Sure, it's faster than DSL, but it's only good to 5000 feet - the last MILE for sure. Great in buildings, dorms, hospitals, etc. For us poor slobs that are 18,000+ feet of copper away from their CO, we're still stuck with lame alternatives. When are we going to see something that solves the DISTANCE problem, not the SPEED one?
"I feel that if a person can't communicate, the very least he can do is to shut up." -- Tom Lehrer
Which one is this?
Ten megabits blows DSL out of the water but ten megabytes utterly destroys it. For those of you going "huh", a byte is composed of 8 bits. Thus 10 MB would be the same as 80 Mb. Please correct the front page if this turns out to be megabits once the page is reachable again.
It actually works pretty well. We use it on a large government facility that has some really old wiring in buildings that we don't have fiber runs into.
Has anyone heard the Cisco story about ethernet over barbed wire? Our salesrep tells a story about a facility in Kuwait (I think) that was having a terrible time keeping a link up between two buildings. The locals kept stealing the cable they were using for the valuable copper. They ended up getting ethernet to run over a piece of barbed wire running between the buildings. The error rate was high, and the sustainable throughput was abismal, but with TCP's error correction they were able to get a useful connection through.
I don't know how true that really is, might be a Cisco myth told to impress customers or something.
Casca
This could become the redneck tech gizmo of the year : networking access points for cows !
As is the case with most press releases (or "feature article" as this document is called) there is an absolute and complete lack of any useful details.
I have had several discussions with people in the chip industry who have seen many "press releases" for products that have not even been designed! The main purpose is to feel out the market. Without knowledge of the industry it's impossible to say whether the product is a complete/feasible/affordable solution.
Are there any Slashdotters who are familiar with the industry and can comment on this release?
That article seemed mostly a puff piece, and fairly short on technical detail (anyone do any digging?). Not that I doubt Cisco's ability to discover methods of doing this, but it also seems a pr piece for investors maybe?
Anyway, it seems like a good idea, however, is there another block here that can be achieved by a company (ie the bells last mile influence on dsl)? Broadband to the masses ideas seem to come and go with the wind lately, and most seem never to pan out.
"Moving through the masses like a fish through water." syrup
So, once again, 90% of the population is too far from the CO for this to bring broadband into the home.
The problem isn't the last mile, contrary to the buzzwords... the problem is getting the pipe to run many, many miles to actual end users' homes.'
If you follow the link to Cisco's site, there is a link on the right for the video presentation.
I do not deploy Linux. Ever.
I've been hearing rumors floating around Las Vegas about using something like this to wire the casino's for broadband with existing wiring. Y'know, they make millions of dollars a year, but they won't put up a cent to wire themselves for cat 5. Bah.
And as a side note...
What sort of cruel parents names their child Hugh Barrass?
Call on God, but row AWAY from the rocks!
I thought that was downloading into a urinal...
Spork Spork Spork, and Spork again!
This is good for 5000ft where as a mile is 5280ft. :-)
People can have funny names. Such a name does not always imply a hoax.
You are clearly not thinking clearly.
...or BWoE. I suspect there would be a number of spikes in the connection.
Bill Clinton: Pimp we can believe in. - The Shirt!!!
It doesn't matter if you can have Ethernet-over-sprinkler-pipes if your Ethernet equipment doesn't have someway to interface with the sprinkler pipes.
Job? I don't have time to get a job! Who will sit around and bitch about being broke and unemployed then?
This kind of stunt has been used to show of the latest technology many different times. At one trade show novell used a fish tank to transfer token ring signals around on their network. Rusty barbed wire has been used many times. I personally know people who have used electric fences to transfer modem signals over a distance of miles to reach the barn.
This is all smoke and mirrors. What you do not realize is that the cross section of all of these materials is large. That is the real problem of data transfer when you break it down. It is the number of electrons that can be pushed over a data source without the cross section of the wire breaking down (over heating and glowing red is usually the indicator of this). What Cisco does not say in this article is if we can still use the phone lines for what they are intended for, phones, once we use this technology. this is not really an advantage if I have to rewire the building anyways so I can still make phone calls. Might as well have put in the regular cat 5 then making the advantage of this pointless.
The final last mile problem has a third part not adjusted by this technology. this is the ancient switches that this must travel through. The thing that has stopped the broadband revolution is the time and effort necesary to switch over all of the network to be able to use this tech. Phone companies are slow to roll these things out. When I worked for an ISP we once had to wait 6 months to install a dial-up location as the local telco had Lost their back hoe and did not want to rent one. How you loose a back hoe I will never know. SO don't hold your breath, this revolution is still born.
Papa Legba come and open the gate
That's not saying much for security if all someone has to do is attach a tap at some point of the barbed wire, or powerline, or kite string, or whatever...
-AlPhAbEt
get your dirty sig off me, you filthy APE!
Okay. So, yeah, we might finally have a reasonable technology to solve the "last mile" problem.
:)
But where the *hell* is all this bandwidth going to come from? I mean, server bandwidth is expensive. I know a few people who donate Debian mirrors, and it costs them a pretty penny, that's for sure.
I mean, I'd still want to have this; if for nothing more than great community networks. (Community as in physical locality)
But this won't solve all our problems, it will probably bring us new ones.
Not that we still shouldn't do it
Barclay family motto:
Aut agere aut mori.
(Either action or death.)
No, this guy did not get teased about his name when he was a kid. . . .
These are my friends, See how they glisten. See this one shine, how he smiles in the light.
I do not believe Cisco does, or ever has, positioned LRE as a "last-mile" technology. LRE is more about leveraging existing cabling infrastucture in a multi-unit facilities such as hotels and hospitals.
Cisco's LRE product offering requires two pieces:
1. An LRE-capable switch at the head-end (such as a 2900XL LRE), which terminates the LRE and has a standard Ethernet handoff to your normal data equipment. In an intergrated voice/data setup (where you're reusing existing voice cabling to carry voice AND data) you would then use their LRE 48 POTS Splitter at the head-end and hand off to the PBX before bringing everything in to the 2900XL LRE.
2. Cisco 575 CPE, which uplinks to the head-end and splits off the voice and the data. Very similar to Cisco's 600 series.
Sound like DSL? It essentially is, just on a smaller scale (3500XL/2900XL LRE costs a whole hell of a lot less then a carrier-class DSLAM). In fact, scanning over the Cisco 575 CPE Overview, Cisco declares the technology to be "based on VDSL".
Draw your own conclusions, but I have never heard this positioned as a last-mile replacement. The article never seems to hint at it either, but simply reiterate their marketing the product line for multi-tenant facilities.
I've used ultra thin RG173U coaxial cable for years. It is great when you want to snake some cable through a tiny opening. Drill a 1/8" hole if need be. It is 50 ohm coax. Use RCA connectors and inexpensive RCA to BNC adapters for the the connection at the BNC "tee".
Speaking of which...anyone have any idea how much a barbed wire interface card for a PIX costs?
Think of all that bandwidth for porn and Quake !
Speeds as high as 10 mbit and some even higher have been done with the various xDSL's at 5,000 feet. That's not exactly a breakthrough. Though I don't spend enough time picking apart the different xDSL types, I know some go up to 20,000 feet(probably more in rare cases). Sure, they aren't exactly doing 10 mbit at 20,000 feet, but 5,000 feet isn't a breakthrough.
The last mile is the
ONLY
mile between you and your CO.
Ethernet over duct tape?
Whatever you cannot build in a quick and dirty way with duct tape is worthless to me.
Trollem mirabilem hanc subnotationis exigiutas non caperet
Starting at 6Mb (same as "new" cisco offer), nextgen supposed to reach 100Mb
http://www.elastic.com/
Is it me, or is the Technical Leader for Cisco named Huge BareAss?
I thought he worked for goatcx...
Hats off to Cisco's engineers for putting this into hardware - with the emerging IEEE standard, hopefully there will be others.
The nice 10 MHz square waves going over an unshielded wire are going to make a whole lot of harmonics (and products) all up and down the radio spectrum. Depending on the power you'd need to push your signal down a mile of barbed wire (and with a transmitting antenna a mile long), I'm pretty sure you'd run afoul of any number of FCC regs. Plus, it would probably just irritate the cows :-).
That is all.
What sort of cruel parents names their child Hugh Barrass?
Probably the same sort that would name their kid "Kisma Butts". No I'm not making this up. Kisma and Pete Butts were brothers who sold used cars at auto dealerships in Nocona, Texas from the late 1940's thru the late 1960's. They're both deceased now.
For Sale: (1) Jar of Vapor, slightly used.
------
Today's Top Deals
... technology to use your old phone lines as fast link layer for IP, they start to sell you Voice Over IP solutions so that you can use your phone again.
(Yes, I know that they claim you can continue to use the same line for speach communication, and I hope that they don't implement this using Voice Over IP.)
Can it do Tinsel?
Can Streaming MP3 ornaments be far behind?
My favorite is still CPIP (Carrier Pigeon Internet Protocol; RFC-1149).
Unfortunately, the problem with dropped packets is not nearly as bad as the problem with droppings.
Did Cisco buy Tut Systems out? I remember them running 10mbps ethernet over any phone cable up to a mile a few years back.
How is this anything new?
What's the point? Cable modem is capable of 2Mb-5Mb or more, but everyone is becoming capped at 128Kb not due to technological reasons, but business decisions. What we need is a cheap super-high-bandwidth solution for the Telcos, so they can open up a fatter pipe to our neighborhoods.
I've built up so much character I have an alter-ego
About a year ago they announced that they had developed a wireless, non-line of sight, 35 mile range, 45 Mbit thing. What the hell happened to that? Short of the press release, I haven't seen anything else on it.
Need Free Juniper/NetScreen Support? JuniperForum
If you could belive it, I might be surfing on a barbdwire connection right now, I think they call it bdw. AHHH! get that cow a@*#p0fuis
"And we have seen and do testify that the Father sent the Son to be the Savior of the World"
1 John 4:14
@ my NOC.
"yes that barbed wire over there, its an outer perimeter defense as well as one of our redundant connections."
"i was saying gnu-rd"
Sounds like HomePna 2.0 to me. 10Mbit that works over even crappy phone lines in the home.
Thats 10Mb(it), not 10MB(yte). DSL is capable of this speed too. Like DSL, its pretty good at running over crap cable, but quality varies with the wiring.
This is a different (fault-tolerant) modulation format for ethernet frames. DSL is a different (fault-tolerant) modulation format for ATM frames.
I think this is interesting, because ethernet doesn't have as many things to mess up, like, for instance, matching the VCI and VPI up on both ends. On the other side of the coin, though, you don't get the subnet seperation and traffic shaping that ATM offers natively. In terms of moving packets from point A to point B, the technologies seem roughly equivelant to me.
Also remember, DSL is capable of 10MBit, and I don't know how much HFC cable is capable of, but if you ever see an ISP deploying this, don't expect them to give you the full capabilities of the wire - broadband ISPs never do (all of the ones I've tried cap bandwidth higher up in the network regardless of what the technology is capable of).
Paranoid
Bwaahahahahaa.
I hate to sound like I'm marketing it, but what about DSDN? It's true that it doesn't run over existing technologies, but for 10 Mbps Internet access it's considerably cheaper than the current alternatives (such as direct fibre-optic lines) and is supposed to cost about as much for the end user as their cable or DSL ISP already does.
It's already in use in Denver as well as a section of Utah, and it's supposed to be very fast in practice - not just theory. The Denver ISP has a site at wideopenwest.com and the company that designed the technology is at switchpoint.com. Switchpoint is the one testing it in Utah as far as I know.
I also know that Slashdot has mentioned this tech before, but it bears repeating this for others; we'll never get past sub-standard cable and phoneline solutions if people don't demand alternatives.
Or is there really a guy with the name Huge Bare Ass? And if so, does this mean I burnt one more bridge and won't ever be hired by their company?
God spoke to me
We are using LRE technology to connect approximately 50 buildings via cat 1 and cat 3 underground phone cable. LRE requires only a signle pair, and can share a pair with a voice line, just like DSL.
Out to 3000 feet 15 megabits is normal, between 3000 and 5000 only 5 megabits is typical, but it depends on the quality of the cable.
This technology is based on VDSL and works using the same principals, but runs at a higher data rate, limiting the distance. Also, LRE transports Ethernet frames directly, without any ATM protocol overhead, unlike most of the other DSL solutions. This greatly reduces costs.
The Cisco 575 LRE device is much like the low-end Cisco 600 series DSL routers in appearance, but has no active layer 3 capabilities. Basically, the remote 575 port appears to the 2924LRE as if it were a local port, allowing trunking and vlan assignments as supported by the 2900 series switch.
If you could order a number of "alarm pairs(dry copper)" from your local telco, between a friendly ISP and your houses, and the distance was less than 5000 ft., this would be a pretty economical solution. Otherwise, it's not of much use for the average homeowner.
-Falcor
It was only 1Mb/s, but it could communicate over ANYTHING. Would not take too much to bump the speed up with todays technology.
This isn't new or suprising. This technology has been around for years. God, I remember using ARCNET to communicate thru barbed wire back in 1995 (as a test to prove it could).
Feed the need: Digitaladdiction.net
Someone needs to convert pound-test to bandwidth, and there you go.
"Would it kill you to put down the toilet seat?" -- Maya Angelou
What happened to internet access over power lines ?
I thought they were going to deploy it last year in Germany but I cant find anything about it, it was something like 100 over MILES of copper
Anyone ?
While this technology is cool, I think they should have put more money into R&D on RFC1149.
For those unfamiliar with RFC1149, here are the details: http://www.faqs.org/rfcs/rfc1149.html
Its probably a bit slower than barbed wire, but damn it... its more fun!
Skiers and Riders -- http://www.snowjournal.com
Yes, you could string barbed wire around your community (pyshical obviously) and have network connectivity to communicate with each other, plus you could advertise it as a "barbed community" like the luxery apartment complex's advertise their "gated community" aspects :)
mcox.com - Useful Information re: IT, Running, Fitness, Finance, or Ann Arbor!
Does anyone know which company they bought to obtain this technology?
The IEEE 802.3ah Ethernet in the First Mile Task Force Web site has stuff on various first-mile-Ethernet proposals; I don't think they've chosen any of the proposals (LRE, or any of the others) as the Official 802.3ah Standard yet.
When I read the article, I didn't see anything about lamp cord , barbed wire, etc. All they mentioned was cat1~3 -- in which case the primary advantage to the technology is that you can now wire most old buldings to 10megabit without having to run more copper through the walls (often without anything even approaching conduit in them.
Free Software: Like love, it grows best when given away.
Where will the bandwidth come from?
Me.
If I had a 10MB connection to my house, I'd mirror shit just to mirror it. I'd download kernels and patches, and tell the maintainers to put me on the list of mirrors. And I wouldn't be alone.
That's one of the reasons that P2P networks work so well. There are so many nodes to get the information from.
Server bandwidth is expensive because it is a scarce commodity. How much do you pay per month for the 100MB connection between your workstation and your server? If you (conveniently) don't count the cost of the infrastructure, the price is zero. Factor in the cost of the infrastructure, and amortize it over the life of the equipment and that number is still ridiculously low. ($70 for two NICs, $80 for a half-decent switch (optional), say it's only good for a year. That's $12.50 a month!)
Server bandwidth is expensive because servers are concentrated into little high traffic nodes. Spread the traffic out (ala freenet, gnutella, morpheus, etc.) and costs drop dramatically. Make bandwidth a commodity, and you will start paying commodity prices.
Not only that, but Jim Allchin of Microsoft is actually Jabba the Hutt. (all chin)
I had to get a 10mbps coax cable down a brick wall into the room below, but coax cable was too thick and the metal BNC connectors were too bulky. I ended up using audio cable that would normally link a stereo to it's speakers. Ping times were still 10 ms. I guess provided that the transfer medium has similiar properties of resistivity, etc, many metal replacements and objects used in infrastructure can be used to transmit data.
A mile is 5280 feet.
Thus this is not a viable solution for the "last file".
Worst Episode Ever
I wonder... Cisco is telling us about this stuff now right?
I'm about to sound like a fanatic, but I'm just "wondering" so be gentle...
What if they or others have known about this (the ability to transmit ethernet packets across just about ANYTHING) for a LONG time. Wouldn't this essentially be the ultimate connectivity for the US gov't to snoop on????
Think about it, a long time ago there was the whole "NSA Key" in the windows registry... suppose for a sec that it was just a hoax, but suppose the intent of the NSA was to have that type of anonymous, untraceable accessibility to ANY computer system. I mean, unless you had a computer powered by a standalone generator, EVERYTHING must use a power chord to connect into the wall @ *some* point...
Didn't I once read something about that in the Rainbow books or whatever they're called, talking about the only secure system is one buried deep underground, without a floppy drive, CD ROM or other magnetic media... something whacky like that... but moreover, one that isn't "plugged" in. We thought it meant "to the net" but maybe they meant "into the wall".
Think about that!
Actually..
Where _does_ bandwidth come from ?
I get bandwidth from my isp, they get it from 2 or three places... and it goes "up the line" until you get networks that are simply moving traffic that doesn't belong to them..
Does UUNet create bandwidth ? Does sprint ? Why dont they create a bunch more ?
Where is the top of the food chain of bandwidth ?
Obviously, its in their interest to keep charging ridiculous fees.
Why doesn't someone else "make more bandwidth" ?
I pay $65/mo for 128/768 DSL with static ip. I think thats because tahts what I'm willing to pay, not because theres any cost structure supporting that price.
There is no peice of technology that I can think of that doesn't become trivial amortized over even a year. Yet T1 and DS3 line charges are still astronomical. Why ?
ISP's overselling bandwidth implies that they cant afford more upstream, implying that upstream bandwidth is expensive, which I've seen plenty of evidence of. Why is this upstream b/w so damn much money ?
Sorry for the incoherency. I just don't understand the cost structure for broadband.
My opinions are my own, and do not necessarily represent those of my employer.
ohno! my connection just crapped out! ... must have been line noise.
I think there is a world market for maybe five personal web logs.
I think you mean RG174/U. Yep. It is ultra thin. You can get it in 0.060 inch diameter. Here is a link: RG174/U thin coax.
Network bandwidth I'm sorry to say does not aggregate when you add nodes to it. You having a 10mbit line to a CO doesn't mean the internet's got an extra 10mbit of bandwidth flying around. That means you've got a 10mbit link to a CO which is sharing a connection to a bigger switch.If anything you've decreased everyone else's available bandwidth. If everyone hooked to your CO decides they want to be a Debian mirror you're all going to have to split the bandwidth available to the CO which is most likely alot less than the combined bandwidth of all of your 10mbit links. Server bandwidth isn't a scarce commodity, you just need to be willing to pay for it because somebody else is paying for it and selling it to you.
I'm a loner Dottie, a Rebel.
Bandwidth is "created" by connecting two transport devices together such as routers, switches, nic's, etc. The speed at which they can send and receive is the bandwidth. If two routers use DWDM to communiacte via fiber, you have "created" 40 GB/s connection.
UUNet, Sprint, MCI all create bandwidth buy buying faster routers, and their downstream providers by doing the same, but this has to continue down to your PC. That's where your bandwidth is destroyed. It's the wiring from your house. Even if Sprint, MCI, deployed technology at 100 Petabytes per seconds, it cant get to you that fast, so you never truly realize the speed.
--- RFC 1149 Compliant.
Back about 4 years ago,
my room-mate discovered that 4 conductor telephone wire was like 2 ¢ / foot when CAT5 was selling for more like 50 ¢ / foot.
He networked our house for like four bucks.
The RJ45 ends were difficult to crimp to the cable
because the cable is so much smaller.
His solution:
Wrap electrical tape around the cable to increase its diameter.
Keep in mind that a 10 base T network only needs 4 of the 8 conductors, but you'll need 8 conductors for 100 Base T.
I do not remember having any bad connections via the cheap cable, but I wouldn't reccommend it unless you're on a college sided budget. Cat5 is cheap.
Seems like 10mbs[1] over thin air is going to be a cheaper last mile solution than any wired system.
[1] Or 54mbps.
Deleted
"Hey, I just got a cable modem; it's so much faster than anything else I've ever used!"
"Oh yeah?! I've got a barbed wire Ethernet line!"
"A what?!"
"A barbed-wire Ethernet line. Haven't you heard of that?"
"Umm... No, I can't say I have."
"Oh... ACME Networks installed it for me last month. It cost a fortune, because there are no barbed wire fences around where I live, so they had to upgrade their entire barbed wire infrastructure; they billed me for like 20 miles of barbed wire fencing."
________________________________________________
suwain_2
I saw the demo for this last year, its pretty lame. If you can, grab the demo kit from the marketing slime and try it with regular 10bT ethernet and it still works.
They have built a big wooden frame, about 1.2 metres on a side. Across the front of it they have a number of strips of cloth, held in place with velcro. The spiel starts about putting a signal down cat5 cable, and how expensive that can be. The rep pulls off the top strip of cloth, revealing some cat5 running between two RJ45 plugs, at the top is a connection to a LRE switch, and coming out of the bottom still hidden by 4 or 5 more strips of cloth is another RJ45 going to another LRE switch with a signal light. The rep makes a point to plug and unplug the cat5 to show the signal lights going on and off.
Then the pitch starts talking about cheaper cable, and then he pulls off the next strip, showing cat3 phone cable. The jumper from the cat5 RJ45 goes into the RJ45 for the cat3, and the jumper on the other side goes down to the next level which is still hidden.
Soon the pitch talks about pushing signal over anything, and the sales rep pulls off the next cloth, revealing two strips of lamp cord. And finally the bottom strip reveals four strands of barbed wire between 4 insulator posts, with RJ45 connectors at either end. BFD.
The final result is that the LRE signal is running over a bunch of impedence mismatched wires for a total distance of about 5 metres. If the rep is doing this canned demo in a conference room and there is 10bT available, try running a regular 10bT signal through this frame, it will probably still work.
They may also have a 200-250 metre spool of twisted pair phone wire with RJ45s at either end. That is impressive, since 10bT will have lots of error at such a distance, but LongReachEthernet will back down to about 2 Mbps and still function.
And this isn't a direct plug replacement for ethernet, LRE requires both dedicated blades in their switches for distribution, and very expensive receiving units for the far end. They are targetting places with old wiring going to a wiring closet, they can't actually compete with DSL at this time. But there is always a question about using these switches for neighborhood distibution when a telco has a small remote switch serving customers at the end of a fibre loop. The rep will not make any committment to that.
the AC
Hemos is like...sci-fi fans;he thinks technology is cool, but he hasn't bothered to understand the science it's based on
This will be good for creating an instant network within a building with older infrastructure. Sort of like Phoneline networking, but a bit faster, and apparently with lower standards as to the actual type of wire (See barbed wire, new meaning to electric fence) Could also be useful if combined with dsl. Now the dsl modem/router/Cisco box/filter is located at the point where the phonelines enter your home/office/courrugated box, then the signal is split over all of the phonelines without needing more filters or a pre-existing network for non-internet needs. Great package for the phone companies. Not really a major advance for "last-mile" needs, but it helps for those who don't want to invest in additional networking equipment or rewire their home.
I though that the entire Excite@Home thing proved that the first mile of service was quickly becoming the most expensive one.
Work needs to be done to reduce the price of traffic over the internet backbones.
Hell ATT@Home had a potential 40mbp/s line running to my house (heck, one time I got 2MBp/s. Yes thats MegaBits per second) but eventualy the price of providing that much bandwidth to their users cause the current scenario of bandwidth now being capped.
What good would a 10mbp/s line do me when I am capped at 1.5mbp/s?
::sighs::
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This is where VC funds come from. For companies like Cisco to have a future, they have to create their market. They do this by supporting (or creating) technologies that will *require* more bandwidth. More bandwidth = more stress on service provider's backbone = switch/router upgrades = $$ for Cisco.
I know a couple of people involved with VC money. Got an idea that requires a faster processor? Intel might float you some dough. Oh, you say that your solution runs fine on a 486? nevermind...
Never never never smoke crack before geometry class!
DOH DOH DOH DOH DOH!!!
MegaBYTES per second MegaBYTES.
I once got a 2MegaBYTES per second download.
Need help treating your acne? Come here!
Ethernet over cat...kinda like rfc 1149: A Standard for the Transmission of IP Datagrams on Avian Carriers
This is necessary...life, feeds on life...
I'll really be impressed when somebody gets 10mb/s from T-CAS (two cups and a string).
13 year old white supremacists are shitty web designers.
"...at 10 MB, it blows DSL out of the water"
Really? Well I happen to work for a major ISP (actually, the first ISP to offer DSL services to the public) and I can tell you that most of DSL modems based on the ADI chipset (ie: most of them) can succcessfully train and transfer data at 14Mb. Furthermore, we are preparing to roll out VDSL here in Canada in the next few months, which can run at up to 52Mb initially. Lucky Canadian users in metropolan(?) areas (at fisrt) will be able to receive digital TV (VOD), digital telephony and Internet all over the same "spit-and-barbed-wire" physical link!
We have piloted such a system using an 11Mb DSL link back in '96
Imagine the distance and speed gains we could have by applying this to ethernet. No more 100M limit on cable lengths... Imagine 100Gb over basic copper :-)
Normal people worry me!
The costs are:
1. Phone companies providing the high speed backhaul circuits: the fiber, the terminating equipment and the maintenance/support and customer support of said equipment.
2. Phone companies providing Last Mile hardware, phone lines, and maintenance/support and customer support.
3. Networking companies (Genuity/UUNet/Sprint, etc) building an IP infrastructure on top of said backhaul circuits, and the maintenance/support and customer support of that.
4. Recovery of any old debt at a reasonable rate both related to and unrelated to the service being delivered, if applicable.
Of course, a margin must me made on top of all this. Don't look at the microcosm of: when I use more bandwidth, it doesn't cost the phone company any more money. Look at it this way: when a million users use 10 times more bandwidth, it costs x more to deliver.
The details of (take DSL) bandwidth utilization are not trivial. If there is a router at your CO, then the marginal costs of communicating with other people in the same CO are zero. If not, the circuit is backhauled with ATM typically to another CO somewhere with a router. In that scenario, there is a marginal cost communicating even with your neighbor.
What's the going rate for a meg (full duplex) of internet bandwidth? Depends on the quantity you buy, but it can range from $200 - $500. The only reason cable and DSL providers can sell it at the prices they do is that most people don't use the bandwidth.
Could you imagine "local" and "long distance" internet service?
ISP: you used 500 hours * 1Mbps of long distance bandwidth last month.
User: Where did I connect to?
ISP: We'll send you the DVD of who you connected to and what you sent and received to prove it.
User: Uh, thanks. (whoa, where do they store that stuff?)
We use something like this -- actually, some small "dsl" modems at work -- to communicate with a shack about 1000ft away from our main building. The company decided not to run fiber originally to the building (it was supposed to be temporary), so only cat3 phone wiring was run.
With the use of 2 dsl modems (10mbps claimed to 10,000 ft, or so the manual says) we've not had a second of downtime in the year the modems have been in use!
Karnal
I'm awed at how many slashdotters cannot tell the difference between MBps and Mbps.
Someone set us up the bomb, so shine we are!
I do this for a living, so I know. At the top of the food chain is the SONET/SDH telecommunications network. That works at between OC12 (660 Mbit/s) and OC768 (40+Gb/s) rates, and go typical distances of a hundred kilometers (upto a thousand). And these rates can be done many times on difference frequencies of light (DWDM) on a single fibers; and you can have multiple fibers between offices as well.
At present, 6.4 Terabits can be shifted on a single fiber, although I don't think that has been deployed in any serious way, ~100Gb/s or so are much more common. If you need more bandwidth, add another wavelength (cost: a millionish); or if the fiber is full (rare right now, but will happen more and more often in a few years or a decade), then you need to lay new fibers- that costs 100s of millions; but we are talking significant bandwidth from that- you don't lay 1 fiber you lay 50 or so and keep most of them for expansion or sell them to other telecoms companies to pay for your layout.
-WolfWithoutAClause
"Gravity is only a theory, not a fact!"Now what I'm waiting for is ethernet-over-railroad-track. I mean, sheeit, that stuff already covers whole continents, no backhoe is going to go through it and it's durned hard to steal. And, at least in the US, there's lots of it that's going underutilized. This could be the recycling innovation of the year.
;-)
For cheap access in large buildings, don't wire the building, just put a short-range radio relay on a building or a pole across the street.
Give a man a fish and he eats for one day. Teach him how to fish, and though he'll eat for a lifetime, he'll call you a miser for not giving him your fish.
Terrorists can't threaten a country's freedom and democracy. Only lawmakers and voters can do that.
The moral dilemma is this: do I spend a fortune getting someone to bring a rough-terrain lowloader hundreds or possibly thousands of km out into the scrub to pick up my worn-out bulldozer, or do I lose it and have the insurance company (whose investigators are *not* about to spend hours on a jet, more hours on a prop-driven buzzbox and more hours - possibly days - in a rented 4WD just to get to the general area) replace it with a new one?
You might think that following the tracks would be an easy answer, but if the 'dozer's been busy in the area, and if the company takes its time reporting the incident, things ain't so simple. In a day, a 'dozer might be 100 or more km away, representing over 300,000 sq km to search for it in.
Moral justice is sometimes done, however, when a strap comes off or a big rock or tree turns the 'dozer so that it either comes back to camp or goes the wrong way and crosses a road or a fence-line where it will be noticed.
Got time? Spend some of it coding or testing
How about properly designed barbed wire? Does that radiate much? Does the strainer, dropper or wire-run spacing make a difference? Is razor wire better or worse? Does the mile include the twists used as barbs, only the actual barbs, or none of it? (-:
Got time? Spend some of it coding or testing
I don't know if this technology has problems with it, but another classic telephony problem is crosstalk - signals leaking from one wire to another one nearby. That's one of the reasons for using good twisted-pair cabling, which reduces it.
Bill Stewart
New Fast-Compression-only CPR http://preview.tinyurl.com/dy575ks
YES! WHAT PISSES ME OFF to the max isn't so much that they cap it.. it's that they cap transfers to THEIR INTErnaL SERVERS AND OTHER CUSTOMERS. OMG! How stupid can you be? If they're so concerned about conserving their bandwidth, why don't they uncap LOCAL ROUTED PACKETS and run a Mirror with all the really popular big downloads. If subscriber to subscriber transfers were not capped, wouldn't you encourage your friends to drop DSL and dial-up and get cable so you can share data LICKITY-SPLIT? I would. hell.. yeah, i too remember the lovely time i had before ATTBI@HOME capped the cable modems.. my upstream wasn't quite up to your's, but still significantly more pleasant than my current sitiation. Now I am stuck with Charter Communications, who cap my downstream too.. and have the audacity to charge the same price. luckily i am moving soon and I get to call them to cancel my service. I'm going to give them an earfull. well maybe not.. but I'll write them a nasty email! that 4 SURE yo!
...and I imagine that Hugh was well beyond sick of it before you even started. Sigh.
Got time? Spend some of it coding or testing
Ooooooh....will it somehow get through the crap lines in my neighborhood where DSL can't even go 5000ft? I'll have to continue renting an office in town until redwood tress can route tcp/ip packets. The phone lines, plumbing, electric lines are all crap here. Cable? Someday( they promise ). And I can't get line of site to the satellites what with the 200+ ft tall trees and all.
And 500k for a small 3 bedroom house? Maybe I'll move to Nevada. No...wait....they don't have Kuumbwa ( www.kuumbwajazz.com )....nevermind.
"everyone's different....I am the same"
yup.......
slashdot thought my previous filler looked too much like ASCII art, and it wasn't even intended to look like leftover cows.
Cisco's LRE is a LAN technology. This doesn't have one rat fart to do with any part of the last mile. It works over existing Cat1-3 (phone) premise wiring for distances of up to 5000ft. This is not a replacement for Cable Modems, DSL, or ougie boards. And no, it does not "blow DSL out of the water." If you are within 5000ft of a CO, you can get very good DSL rates over ONE (30AWG) pair (not the 4pairs that comprise CatX cables.)
This is technology for multi-tenate units like apartment buildings, hotels, offices, malls, etc. The article spells this out in perfectly plain engligh:
- Owners of multi-unit buildings such as hotels, apartments buildings, business complexes, universities, hospitals, manufacturing floors and government agencies are now able to deliver an unprecedented number and a variety of new, broadband applications to users.
You will not see this being run through the public telephone grid.There actually is an IEEE standards body for "Ethernet in the Last Mile" -- I don't know the number for it off hand. And companies are designing hardware to provide 10M ethernet connections with further reach than SDSL. And this is last mile technology. (I'm too far from the CO in any case.)
Or Apple, Sun, etc.
http://www.e-insite.net/ednmag/index.asp?layout=ar ticle&articleId=CA90788
I caught that one as well, but I think it's phonics, not dyslexia ;)
Look at zarlink, icanos or the press releases of alcatel. If you take a decent VDSL modem, you get something like 60 Mbps at 500m and 10-15 Mbps at 1500m. The only thing that's new about this is that it runs ethernet - and ethernet in the first/last mile is being standardised by IEEE.
I've been wanting to go online from my treehouse for ages, but when I tie a piece of string to the telephone poll I can't get it to work.
/^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i
They're don't use square wave, so it's not quite *that* bad.
:-)
Of course, EMC only exists in Europe, much like global heating. I actually performed RF immunity and emission tests on my prototype last week. IEC will come and *smack* you if you try running 10Mbps over barbed wire over here
Actually, you cannot run 100Mbps with unshielded twisted cable without breaking regs.
To make things that much worse, every barb is a small antenna for high frequencies. Yeek!
can this network technology be used in conjunction with TCP/CP (Carrier Pidgeon) for wireless access? :)
Software Freedom Day!.
OH YA...Now I can finally get my cows the porn they have been wanting.
Yet again Cisco's marketing machine is taking credit, where none is due. The Cisco version of these products might be new, as of summer 2001. But, the technology and the market are several years old.
Numerous companies have been shipping this technology for years. It is used in many hotels to provide high-speed internet access.
One of the first, and probably the best of them all is Elastic Networks, a spin-off of Nortel Networks. See also, Tut Systems and there are more.
Nothing new here, just the same old Cisco BS.
>robots to get fiber to the basements
>of buildings, and then use the existing
>cat-
Yeah, like that's going to work. Little thing crawls out and runs around with a string, and you think the cat won't attack???
:)
hawk
Think of the consequences. Who lives by the barbed wire?
That's right, the cows. The ones we eat. And what do cows produce?
Right again, *staggering* quantities of methane. Now think a second. Suppose you're a cow. You can't be *all* that thrilled about your future prospects (unless, of course, you're a dairy cow). So you start thinking slow cow thoughts between transferring your cud between stomachs. But it eventually comes to you.
If they can send ethernet over the barbed wire, how much harder can it be to send *methane*. As they work it out, the first signs will be press reports about herds of cattle charging barbed wire fences backwards. The second wave will be the explosions in switchboxes and phone relay centers. But once they have the bugs worked out, every farmhouse in the United States will be destroyed in a matter of days! What will we eat! Stop trnasmission over barbed wire NOW!
hawk
But that's my point. It's the reason that AOL uses proxies. The reason that your browser has a disk cache of recently accessed objects. If every request required the transfer of all of the information needed to render a web page...
Think about the time (NIST) servers. There is a really small number of tier 1 servers (or is there just one?), a greater (but still small) number of teir two servers feeding off of the teir one. Then there are the teir three servers. My ISP runs a tier four server and encourages all of its customers to use it. If everyone could access the tier one server its bandwidth usage would be astounding. As it stands, ntp requests are spread over a fairly large spectrum of servers.
Look at akamai. They keep fairly local repositories of bandwidth intensive material. When I check my online comics, I receive the images from an akamia server at my ISP. I get the content faster, my ISP doesn't have to pay for the upstream bandwidth of me viewing the comic, and the comics image server doesn't have the added stress of my viewing this image.
If I had a 10MB connection to the internet I'd be more willing to share that resource, and as such could provide content topologically closer to people around me. Spread the pain so to speak.
Not everyone would decide to be a Debian mirror. Only one (or five) of us would. The rest would snag it from him (or them).
Ah, it's so much fun to dream of utopia.
But what you're not picking up is that your 10mbit connection ONLY exists between you and the CO which is probably only a few miles from where you live. To the rest of the internet your connection is just a branch off of a T3 that goes from your CO to somewhere with an OC-3 or something. When you download anything from anywhere not directly connected to your CO you're using up bandwith on someone's pipe somewhere. Granted, if the CO provided a means for all users connected to the CO to talk to each other without involving the rest of the internet you'd have a point.
However your point about the comics is a bit flawed, if the server at your ISP has the comic image cached and you download it from that ISP that image still has to travel over a trunk line between the ISP's POP and your local CO. This does cost money. It costs money in terms of space required to cache it and the trunk bandwidth used to send it to you. The only way you'd get away with nearly free bandwidth was if your local phone company was also an ISP and housed its computer equipment in the CO building itself. With cable or DSL you don't have a whatever megabit connection to the internet, you've got a whatever megabit connection to a DLC and are lucky if that bandwidth is maintained once it goes out to the rest of the world. Letting you personally cache stuff would only work if you could talk directly to others on the local loop. No cable or DSL provider I know of does this because they're all structured to connect you to the internet, not connect you to your neighbor.
I'm a loner Dottie, a Rebel.
A day late and a dollar short. LinkSys has a powerline bridge that will get 14mb.
Jamey Kirby
Now if this stuff showed up earlier, they wouldn't be so bankrupt...
Very good points. I misunderstood your original premise.
I still think that having multiple nodes with the same information would lead to less congestion overall (just as building housing near emplyment reduces overall vehicular traffic), and lower costs for specific servers (such as kernel.org).
As a side note, both the local phone company and the ILEC that has plant in town (a Lucent 5E switch capable of both local and LD) and owns the cable company, as well as the biggest upstream fibre optic link (it's really a mess) are ISP's.
Multiple nodes with the same information only relieve traffic if they are close in terms of the network. Lets say you've got five mirrors up and serving some file. The load on each of these individual mirrors is going to be less than having a single server but if all of those mirrors are on the same connection (in the same data center), the stress on the pipe between the data center and the rest of the internet is the same. Now if these mirrors were like you suggest actually housed at a local POP there'd be next to no added traffic on external links. One big problem is a majority of internet traffic eventually moves over a handful of high speed lines. In theory the internet is a giant web of connections but in reality it is a bunch of small webs all connected by fat links. Anytime data has to travel over these fat links no matter how many nodes you've got on either side, the bandwidth over those links is stressed. That's actually where Akamai comes in, they get mirrors stuck up all over the place so no matter what file is requested it usually exists close (in network terms) to any node requesting it.
I'm a loner Dottie, a Rebel.
An Spanish company called DS2 develops systems that let you send data up to 45 Mbps using the powerline.
From their website: Our technology supports transmission speeds of up to 45 Mb/s, the fastest on the market. With DS2 know-how, existing medium and low voltage electricity networks are transformed into lucrative data supply lines opening up the power of these networks to support high-speed communication services such as:
I think Cisco's "new" technology is not any useful if you take a look on DS2's tech. Everybody who is going to use a computer has a powerline. Not everybody has Cat1 cables.
Just happens to be C:\
Watch the video again, and when he goes over to his "link to their file server", watch the tooltip on his link come up and say: "Location: C:\" He really copied that file over from their file server... riiiight.
This is true, but the cost of the backbones is spread across evyone who uses it. Penny-Arcade (for example) doesn't pay C&W for the traffic originating from their servers. They pay their ISP. If I'm mirroring their content, then I can (in theory, it would never work this way) half their bandwidth bill.
That's all I was trying to say with my original post. Many hands make light labor, and many (diversly located) servers make for light(er) bandwidth bills. Akamai just automates this (to great effect).
If I had bandwidth to spare, I'd be happy to set myself up as a mirror. As it is, I have a 128K return path, which is just about enough for two or three modem users to saturate. True this would possibly aliviate some main server from having to deal with those two or three folks, but the reward just doesn't justify the effort for me.