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New Computer Powered By PoE

Zonk posted more than 9 years ago | from the it's-everywhere dept.

Networking 354

BlakeCaldwell writes "BBC News is reporting about a new PC that's powered via a network cable rather than through a wall socket. The computer only requires 12 watts, lower than the upper limit of 15.4 watts that power over ethernet (PoE) can supply. FTA: 'PoE could end up being a universal power supply system as the cables and connectors for it are the same all over the world. By contrast power sockets and plugs differ by country.'"

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Wireless? (0)

Anonymous Coward | more than 9 years ago | (#12383069)

I want Power over 802.11ZZZ

Re:Wireless? (0)

Anonymous Coward | more than 9 years ago | (#12383113)

Yeah, I was going for a +X FP (never had one of those yet); but more seriously; I'd rather have power cables and wireless networks than combining the two into a single table.

I imagine any computer that's not a server (which'll take way more than 12 wats) will soon be a laptop or handheld anyway.

Re:Wireless? (5, Interesting)

Anonymous Coward | more than 9 years ago | (#12383142)

I know you were kidding, but wireless power Does exist [newscientist.com] . T

Almost Brilliant (4, Insightful)

AKAImBatman (238306) | more than 9 years ago | (#12383076)

I was thinking that this had to be one of the most brilliant ideas ever, right up until I realized that users are moving toward WIFI for connectivity. If this had srrived two to three years ago, we might all be using it now. But at this juncture? Likely to be ignored. :-/

Re:Almost Brilliant (0)

TheSpoom (715771) | more than 9 years ago | (#12383126)

It's great until someone realizes they plugged the power cable into their ethernet port, frying their system.

Re:Almost Brilliant (2, Funny)

The New Andy (873493) | more than 9 years ago | (#12383133)

Well, power over WiFi never really took off with people discovering that mother nature had blessed them with an internal receiver.

Power by wifi.. (1, Funny)

the_twisted_pair (741815) | more than 9 years ago | (#12383195)

...sounds like a job for Nikola Tesla... for which you will need a tin foil ha*bang*fizzz* ~#$£$%&)67~NO CARRIER

Re:Almost Brilliant (5, Insightful)

terraformer (617565) | more than 9 years ago | (#12383201)

I agree totally, but with one caveat. I work in energy efficiency and specifically that of computers. Business and Enterprise continue to use 10baseT and show no signs of changing that for their desktops (not saying they are not using WiFi...) and a business with 10K pcs spends hundreds of thousands to as much as a million dollars on energy a year for PCs (including monitor). What this eliminates is a power supply per pc and the attendant overhead. Consolidating the power supplies groups of computers (power supplies/transformers have efficiency issues depending on load). Also, this forces them to build a desktop with the usage profile of a highly efficient laptop to get under the 15.4 watt limit. The cost savings of using this technology could be very attractive to business. The WiFi concern is one in home and small business networks primarily.

Re:Almost Brilliant (2, Interesting)

RealProgrammer (723725) | more than 9 years ago | (#12383322)

I work for a public university. The people who are accountable for the equipment budget and the people who pay the light bill never talk.

I recommend flat panel monitors to people based on aesthetics and reliability. Power consumption (30-40 watts for an LCD, 150 for a CRT) is a non-issue with users, since the power bill is paid by a central campus entity and doesn't show up on our departmental budgets at all.

Actually, I don't know who pays the power bill. Maybe nobody!

Re:Almost Brilliant (4, Interesting)

mrm677 (456727) | more than 9 years ago | (#12383392)

I work for a public university. The people who are accountable for the equipment budget and the people who pay the light bill never talk.

As a student, I worked at several of the computer labs at a large university (40,000 students). One late night when I was closing down, I thought to myself how silly it was to keep the CRT monitors powered on. This was before things automatically shut-off. So I went around to about 200 computers and shut-off the monitors. The next day I got in trouble by my manager...they didn't like my idea at all and didn't care about the heat or electricity savings. Apparently going around to turn them back on in the morning was too much work! I figure for about 6 years (before the advent of auto-shutoff CRTs and LCDs), this university ran > 1000 CRTs 24/7. Anybody care to guestimate how much electricity they could have saved over this time period?

Re:Almost Brilliant (1)

terraformer (617565) | more than 9 years ago | (#12383407)

This is a common problem (called a split incentive) and why we end up approaching the energy manager and IT at the same time. Anyone can contact me through the website attached to my /. UID and I can get good info to help you get everyone on the same page.

Re:Almost Brilliant but who pays for it (0)

Anonymous Coward | more than 9 years ago | (#12383218)

Umm, who pays for the power? somebody needs to pay for those 12watts. It is not like power is a free commidity. PoE is nothign mroe then a different plug in. WTF is the point.

Re:Almost Brilliant but who pays for it (3, Insightful)

Speare (84249) | more than 9 years ago | (#12383318)

Uh, fewer cables and redundant AC/DC converters (wall warts)? Why does every single device need to have a heavy power-processing unit to do the same task of AC/DC conversion? Do it once and make many devices share the low-voltage supply.

Efficiency in action (0)

Anonymous Coward | more than 9 years ago | (#12383393)

blow many devices up at the same time

Re:Almost Brilliant but who pays for it (0)

Anonymous Coward | more than 9 years ago | (#12383468)

Why does every single device need to have a heavy power-processing unit to do the same task of AC/DC conversion?

Because the current common 30 gauge wire that is most CAT5 cables produces substantial energy loss due to heat when anything more then tiny watts are passed through it. It is just too much to deal with for any consumer uses.

Jane doe will wonder why she smells burning plastic. IT really has no applicable uses other then custom solutions in which case, there are better preexisting AC/DC conversion solution available.

Would you really want to run your device via an Ethernet cable? I wouldn't.

Re:Almost Brilliant but who pays for it (1)

AndroidCat (229562) | more than 9 years ago | (#12383453)

Back in the dawn age, weren't there some cheesy modems powered by the phone line? I'll bet that the phone companies had something to say about that idea. (And said by large lawyers with clubs.)

(Not so much the cost of the power as that the system wasn't designed for large scale freeloading.)

Re:Almost Brilliant (2, Informative)

cidco (240900) | more than 9 years ago | (#12383277)

POE wasnt really designed for everyday use, it was designed for manufacturers to have an easy way to power small devices on their control network. Seeing as many control networks are now going to ethernet rather than serial communcattions (DH+, Modbus+, etc). This allows them to remove a lot of the extra cabling from their orginal networks.

Also POE is used in a lot of place s to power the wireless APs for WiFi.

FPoE (-1, Offtopic)

Anonymous Coward | more than 9 years ago | (#12383088)

This First Power Over Ethernet was brought to you by the the score, the colon, the minus, the one, the comma and the troll!

Whoa... (4, Funny)

TheSpoom (715771) | more than 9 years ago | (#12383098)

Was I the only one who saw that as powered by Pieces of Eight? That must be one expensive computer... but at least it recognizes that most people will use it for piracy.

(Damn, I play Puzzle Pirates way too much. And yes, I know the answer to my question was yes.)

Re:Whoa... (1)

joshdick (619079) | more than 9 years ago | (#12383137)

Yarr, ye need to get away from thar magic box and get some sunlight, ye scallywag.

Re:Whoa... (1)

WidescreenFreak (830043) | more than 9 years ago | (#12383199)

but at least it recognizes that most people will use it for piracy.

You get a virtual +1 funny since I don't have any mod points right now. I wonder how many people are actually going to make the connection, though. "Pieces of WHAT? Eight is a number! A piece of eight is a four!"

Signature Response (0)

Anonymous Coward | more than 9 years ago | (#12383373)

In your sig are you using a more elegantly worded "I'm rubber, you're glue..." defense?

PS: I know you are but what am I?

Re:Whoa... (1, Funny)

Anonymous Coward | more than 9 years ago | (#12383230)

Har, ye are not alone in this conclusion. I also play Puzzle pirates, and was confused at the beginning about how I could pay my computer to work for me. Is it sort of like bribing?

actually... (1)

dknight (202308) | more than 9 years ago | (#12383448)

... I thought the same thing when I first read it..

damn that game!!

More interesting towards the end.... (1)

Robert Hayden (58313) | more than 9 years ago | (#12383104)

I find it more interesting the idea of a new PoE standard that will provide more power. Of course, those of us that have invested millions in the current PoE "standard" for VoIP and wireless will need to forklift everything.

a new Mac mini killer! (0)

Anonymous Coward | more than 9 years ago | (#12383106)

SCNR

Quoth the network admin turned electrician: (2, Funny)

Anonymous Coward | more than 9 years ago | (#12383107)

Nevermore, nevermore! I'll get a job at Best Buy before I support you power whores.

Powered by PoE? (4, Funny)

utexaspunk (527541) | more than 9 years ago | (#12383108)

I wonder which will work better- The Telltale Heart, or The Raven? Maybe The Cask of Amontillado?

First Plug! (1, Interesting)

Anonymous Coward | more than 9 years ago | (#12383109)

From TFA, is 35 watts enough to run most laptops? I have a pig of a laptop (Sager 8890) that draws 120 watts.

Re:First Plug! (4, Interesting)

AKAImBatman (238306) | more than 9 years ago | (#12383172)

is 35 watts enough to run most laptops?

Considering that my iBook uses a 65 watt charger, I'd say that 35 is probably sufficient for anything short of the "Desktop Replacement Laptops" (relly more of a portable desktop). My guess is that the laptop will most often run below 35 watts, then trickle-charge the excess to the battery. If the computer needs extra power in the short term, the battery will provide it.

Dr Strangelove, is that you? (4, Funny)

Anonymous Coward | more than 9 years ago | (#12383110)

PoE = Peace on Earth. Purity of Essence.

Re:Dr Strangelove, is that you? (4, Funny)

Shelrem (34273) | more than 9 years ago | (#12383419)

I first became aware of it, Mandrake, during the physical act of love. Yes, a profound sense of fatigue... a feeling of emptiness followed. Luckily I was able to interpret these feelings correctly. Loss of essence.

I can assure you it has not recurred, Mandrake. Women sense my power and they seek the life essence. I do not avoid women, Mandrake, but I do deny them my essence.

First computer powered over Ethernet? (0)

Anonymous Coward | more than 9 years ago | (#12383120)

Will this also work over WiFi?

Re:First computer powered over Ethernet? (1)

beef3k (551086) | more than 9 years ago | (#12383161)

Yes, of course it will, although you might get electrocuted while casually walking through your living room.

Unlikely... (4, Funny)

bodfa (656636) | more than 9 years ago | (#12383129)

FTA: 'PoE could end up being a universal power supply system as the cables and connectors for it are the same all over the world. By contrast power sockets and plugs differ by country.'"

This seems to fit somewhere along the lines of IPV6 and enough ip addresses for your toaster to be ip enabled. Yea... No toast today, the network is down.

Patient? You'll be toasing that bread for hours (0)

Anonymous Coward | more than 9 years ago | (#12383340)

with only 15 Watts at your disposal.

Most toasters use 1000 - 1500 Watts.

More info from Slashdot and POE site ... (3, Informative)

Hulkster (722642) | more than 9 years ago | (#12383131)

Slashdot has discussed "Power over Ethernet: IEEE 802.3af" [slashdot.org] and how the Apple AirPort Base Station supports POE. [slashdot.org] There also appears to be a website dedicated to Power over Ethernet. [poweroverethernet.com] Ummmmm ... maybe I could use POE to power my christmas lights [komar.org] ... although I'd need a bit more than 15 Watts! ;-)

Re:More info from Slashdot and POE site ... (1)

GraemeDonaldson (826049) | more than 9 years ago | (#12383205)

Yeah, like anyone's ever gonna fall for that one again. ;-)

Overclocking? (0)

Anonymous Coward | more than 9 years ago | (#12383134)

Then how do you overclock that sucker with only LAN power?? Can I at least splice multiple LAN lines together for more power?

Re:Overclocking? (2, Interesting)

eclectus (209883) | more than 9 years ago | (#12383360)

easy, plug in more lan cards.

My initial concern... (3, Interesting)

Jurph (16396) | more than 9 years ago | (#12383141)

...is that the current equipment out there is probably not actually delivering all of the wattage that the specification calls for. For example, a cable modem draws about 20 [pmb.co.nz] watts from the wall; even if it's delivering all of that to computers on the network with no losses... then it can only support one of these machines without drawing power from somewhere else.

gbit and PoE (0)

Anonymous Coward | more than 9 years ago | (#12383148)

PoE was using unused lines in the ethernet cable,
right? and gbit new uses all 4 pairs, so is that the end of PoE?

can plugging in a gbit network card into a PoE enabled line damage that card or the computer?

Re:gbit and PoE (1)

FreeLinux (555387) | more than 9 years ago | (#12383250)

PoE was using unused lines in the ethernet cable
Yes.

and gbit new uses all 4 pairs
No. Gigabit ethernet uses the same pairs as 10/100 ethernet.

so is that the end of PoE?
No.

can plugging in a gbit network card into a PoE enabled line damage that card or the computer?
No. Unless you do it while you are in the bath tub ;)

Re:gbit and PoE (2, Informative)

Xepherys2 (174396) | more than 9 years ago | (#12383364)

No. Gigabit ethernet uses the same pairs as 10/100 ethernet.

No. 1000Base-T (802.3ab), or Gigabit Ethernet, does indeed require all four pairs (8 conductors) of the cable.

No GigE support (2, Insightful)

nd (20186) | more than 9 years ago | (#12383150)

This works using the "unused" lines of CAT5. Sure, they're unused for 10/100 ethernet, but this will be much less useful once everyone is using Gigabit ethernet (which uses all 4 pairs).

Re:No GigE support [WRONG] (5, Informative)

highfreq2 (575192) | more than 9 years ago | (#12383406)

Actually, it works by put 40VDC between the TX and RX pairs. The coupling transformers block the DC before it gets to the PHY. It is compatible with gigabit. POE allows the use of the unused lines. This is needed for a seperate power injector, which can't touch the signal lines.

I'd hit it... (1, Redundant)

er_head66 (224488) | more than 9 years ago | (#12383155)

when they start Power over Wifi...

Re:I'd hit it... (1)

Bazman (4849) | more than 9 years ago | (#12383288)

There's enough power in radio transmissions to be able to pick them up without power. I used to have a little radio set where you clipped a croc clip to something big and metal (like a radiator, which is probably connected to the rest of your heating system) and then stuck an earphone in your lughole. You could get the main radio stations.

A long way to being able to power a PC though. Now microwaves.....

Re:I'd hit it... (1)

denis-The-menace (471988) | more than 9 years ago | (#12383300)

if you can stand the headaches from the microwaves...

First PoEst? (1, Funny)

The Dread Pirate Rob (75666) | more than 9 years ago | (#12383156)

Did I get first PoEst?

Re:First PoEst? (1)

AndroidCat (229562) | more than 9 years ago | (#12383189)

Quoth the raven: Nevermore.

Re:First PoEst? (-1)

Anonymous Coward | more than 9 years ago | (#12383227)

I don't get it.

Re:First PoEst? (-1)

Anonymous Coward | more than 9 years ago | (#12383351)

And you never will.

Can you say... (1)

RealProgrammer (723725) | more than 9 years ago | (#12383162)

single Point of Failure? There, I thought you could.

(I know that's PoF, not PoE, but hey.)

Not everyone has PoE (2, Insightful)

Tree131 (643930) | more than 9 years ago | (#12383164)

Not everyone has PoE at home, so this solution would only be ideal for businesses. You can of course always get a PoE cable that will plug in to the wall socket through a transformer and the ethernet jack, thereby combining the power, however that defeats the purpose of PoE, because most devices out there support both 110V and 220V, and they all have universal connectors and power supplies capable of handling whatever voltage you throw at them. An you'll still be plugging it into an electrical socket. You will also need a helluva lot more power to run processor intensive apps, so this would pretty much limit this machine to secretaries and web surfers/majority of home users - see above on why this is not a solution for home.

In the future... (5, Funny)

Anonymous Coward | more than 9 years ago | (#12383169)

So in the future everyone will be getting their power from ethernet cables and their connectivity through power lines [slashdot.org] ?

re: poe (0)

Anonymous Coward | more than 9 years ago | (#12383183)

A computer powered by Teletubbies??

What if.... (0)

ProppaT (557551) | more than 9 years ago | (#12383185)

What if you plugged the power RJ-45 connector into the the ethernet card and not the power input? Wouldn't you fry, at the very least, your network card? Or are typical network cards rated to 15.4watts of current?

I don't know, I think that even if it does work and doesn't damage network cards that it would still be confusing to consumers...

Re:What if.... (2, Informative)

Cecil (37810) | more than 9 years ago | (#12383342)

The ethernet port *is* the power input. RJ-45s have 8 connectors. PoE uses some of the spare conductors to provide power, the rest still do data.

ObRTFA:

Power-over-Ethernet (PoE) works because when data is sent down network cables it is represented by voltages. PoE uses spare wires in cables that link computers back to network hubs and pump power down these, separate from data traffic.

Re:What if.... (0)

Anonymous Coward | more than 9 years ago | (#12383438)

All ethernet cards have input coils used to filter out any DC voltage on the data cable. Cards I have seen typically have 500v or more of protection. PoE is 48v DC on either the unused, or the two data pairs of the Cat5 cable. Plugging a PoE power cable into a non PoE device is not an issue.

universal my ass (-1, Redundant)

karmaflux (148909) | more than 9 years ago | (#12383190)

Let's see my Athlon 64 with its GeForce 6800 run on 12 watts of power -- or 15.4 for that matter. I think the author's just getting a little excited about old technology.

Now, if we could rig power over 802.11g... then we'd have something.

Must have given up (1)

kpwoodr (306527) | more than 9 years ago | (#12383191)

I guess the power company gave up on providing internet access over the power lines...Power over the internet lines is the next best thing!

horrible joke, mod low! I'd like troll please.

PoE (5, Informative)

karvind (833059) | more than 9 years ago | (#12383197)

I am not sure why is this a new news when the idea is around for sometime.

The Power over ethernet [poweroverethernet.com] website which has links to articles and products (check the dates on some of the articles).

A good article about ins and outs of PoE [nycwireless.net]

Don't confuse PoE with Perl Object Environment [slashdot.org] or Poe Puzzle [slashdot.org]

Nevertheless it is a good concept with lot of benefits (as well as drawbacks)

Cost savings. PoE significantly reduces the need for electricians to install conduit, electrical wiring, and outlets throughout the facility. In larger installations, these items can be relatively expensive. Consider an installation of 50 or more access points. This requires lots of conduits, outlet boxes, electrical wiring and the time of a qualified electrician. The low costs of deploying PoE compared to traditional electrical circuits leads to worthwhile returns on investment.

Flexible access point locations. With PoE, a wireless LAN designer has greater freedom to locate access points. You don't need to depend on only locations within short distances from AC outlets. The independence from AC outlets also makes it easier to relocate access points in the future if needed to fine-tune RF coverage or increase capacity. Thus, PoE enables companies to more easily maximize the performance of a wireless LAN.

Higher reliability. Systems with fewer wires tend to be more reliable. With WLANs not using PoE, cleaning people may unplug an access point to use its AC outlet to power vacuum and buffing equipment. Electricians rewiring electrical circuits could inadvertently cut power to an access point. PoE eliminates the possibility of situations that disrupt the operation of the network.

Enhanced operational support. Many PoE devices implement SNMP (simple network management protocol), which enables support staff to remotely manage the electrical power supplied to the access points. For example, support staff can disable a PoE-enabled access point by shutting off its power after detecting a breach of security. The temporary disabling of the access point can protect against an intruder from continuing unauthorized access to corporate systems. Other SNMP-based features enable the monitoring of the condition and consumption of power, which enhances the ability to ensure smooth and efficient network operations.

Simpler international development. For manufacturers, PoE offers the benefit of the vendor not needing to provide different power cords for various countries. This not only helps keep the cost of access points done -- it's one less piece of equipment that installers need to worry about

Re:PoE (0)

Anonymous Coward | more than 9 years ago | (#12383262)

Thanks for the information.

A white paper from 2004, so the concept is not new [panduit.com] .

So, if I use the power lines (1)

benhocking (724439) | more than 9 years ago | (#12383355)

So, if I use the power lines for broadband ethernet [hometownconnections.com] , will I still be able to use this technology to power my computer, or does it only work for ethernet cables?

wiring mistakes (1, Insightful)

bigmo (181402) | more than 9 years ago | (#12383198)

can be a very bad thing with power over ethernet. I suppose most equipment would be ok with power on the wrong pins since it's probably 5v anyway. However, some equipment (such as cat5 audio/video distribution boxes) aren't usually made to handle power at the wrong place or even worse, if it's at 12v. For the correct app, it's really convenient, but I think "universal power supply" is a little optimistic.

I read that as (0)

Anonymous Coward | more than 9 years ago | (#12383206)

"New Computer Powered By PoS", and was wondering if that meant I could use my old piece of shit computer to power the new one. Oh well.

This is way cool! (1)

PenguinBoyDave (806137) | more than 9 years ago | (#12383211)

I think this is cool because it shows how little energy is required. I am now wondering if there would be a way to mount a solar cell on the outside of a laptop that could be positioned in such a way as to catch enough light to make the WiFI people able to use this low-energy computer. Hmmmmmm

Re:This is way cool! (1)

DrinkingIllini (842502) | more than 9 years ago | (#12383372)

Where are you going to mount a solar cell on a laptop? Put it on top and you lose a lot of light when you open it, anywhere else it's inconvenient. I think WiFi people will have to stick with batteries.

Re:This is way cool! (1)

PenguinBoyDave (806137) | more than 9 years ago | (#12383426)

What I would do is mount in on the backside of the monitor (the top) but put it on hinges that would allow you to open it up in such away that would allow you to get max light. I'm sure it is much more complex that I am capable of, but someone out there who is in to all that and has the knowledge to actually make something like that work could do it.

pff (-1)

Anonymous Coward | more than 9 years ago | (#12383236)

Internet over the powerline, power via ethernet cables.. whhyyy...? :)

In other countries... (1)

Tenebrious1 (530949) | more than 9 years ago | (#12383240)

By contrast power sockets and plugs differ by country.

Which is why I carry one set of adapters for my laptop, and then charge my cell, palm, blackberry, and iPod via the USB on the laptop. Sure PoE might provide enough power to run a laptop, but it wouldn't provide enough juice to recharge the laptop batteries and all the other devices I need charged.

Don't you need a switch which supports PoE? (2, Interesting)

Digital_Quartz (75366) | more than 9 years ago | (#12383242)

"PoE could end up being a universal power supply system as the cables and connectors for it are the same all over the world."

Don't you need a hub or switch which supports PoE? Ethernet sockets may be the same all over the world, but how many PoE-enabled ethernet sockets have you seen on a day to day basis?

That's great, but... (0)

Anonymous Coward | more than 9 years ago | (#12383243)

OK, so if you're powering a router or some other low power device, great!

But this is fairly useless for powering anything else. Sure, you can build a computer running on 15 watts. It just won't be able to do anything useful.

Consider that a "small" powersupply on the market these days delivers about 250W.

I'd be MUCH more intersted in seeing a "hey, we can do useful stuff with only 15 watts!" story than a "and we're drawing the power through the low-voltage wires in the network port" story.

Make it useful and I'll be impressed.

Cool ... but (1)

tomstdenis (446163) | more than 9 years ago | (#12383253)

We already have PoU [Power over USB] which was a rehash of PoS [power over serial/parallel] etc...

I think it's good that we can use something like an already existing cat-5 network to power a computer though..

In my case my USB powered 3-port cat-5 switch was handy when I was in France last as a quick-and-dirty means to a network. Can get ~50Mbit/s off it which isn't bad for 2.5 watts.

Tom

no subject (-1, Offtopic)

uniqueUser (879166) | more than 9 years ago | (#12383255)

I was once a memeber of the local Y-Club which had a pretty nice gym. In order to get access to the gym, I had to place my hand on some sort of magnetic imagaing plate. I thout it was pretty neat.... I quit the gym when I joined /.

Beg your pardon? (1)

xtracto (837672) | more than 9 years ago | (#12383258)

FTA: 'PoE could end up being a universal power supply system as the cables and connectors for it are the same all over the world.

FTA?? That meaning F*ck the article??.

Seriously, it would be nice to be able to charge your Laptop battery with the Network cable, although current notebooks have a 120~230 AC adapter, I think it is cumbersome when I need to connect: 1. the laptop AC adaptor; 2. the laptop network adaptor; 3. the 2 or 3 USB devices I have (camera, external HD, etc). I end with so much cables for a portable notebook...

Or "From the article" (0)

Anonymous Coward | more than 9 years ago | (#12383416)

FTA could also be "From the article".

Great! (1)

JohnTheFisherman (225485) | more than 9 years ago | (#12383263)

PoE could end up being a universal power supply system as the cables and connectors for it are the same all over the world. By contrast power sockets and plugs differ by country.

That's awesome! It solves the cable problem! I'll just plug my universal AC/DC power supply into....d'oh!

not likely. (0)

Anonymous Coward | more than 9 years ago | (#12383267)

Most 48 port PoE switches cannot provide 12 watts to every port. Additionally, the power consumption in the networking closet would be through the roof if you were to specify the availability of 12W/Port. Also this opens up another point of failure on the power-supply path.

Re:not likely. (1)

duffbeer703 (177751) | more than 9 years ago | (#12383417)

This obviously isn't going to replace standard electrical sockets anytime soon, but there is alot of potential to create efficient offices with this technology. Telecoms and the military have been using DC powered computers with centralized power supplies for years.

Right now in a typical office, you often have hundreds of computers on a floor, each with their own power supplies converting AC-power from the wall to DC that the computer can use. It is obviously inefficient to be running a couple of hundred 300W power supplies than one or two big ones.

If you could easily centralize on a couple of power converters, you would see major efficency gains, both from the converters themselves and from reduced air conditioning load in the office areas.

Nice, but... (-1, Redundant)

Eyeball97 (816684) | more than 9 years ago | (#12383272)

As a few have pointed out... a day late and a dollar short... Wireless... GigE... Not to mention 12w doesn't go far...

I'd rather see much more effort in developing cheap (as in similar in price to deploying PC's) blade systems - stick a box with 64 cards in it in the server room and just run the monitor and keyboard over an ethernet cable...
Already available I know but man, the prices...

Not everyone uses PoE (1)

mrmagos (783752) | more than 9 years ago | (#12383278)

FTA: 'PoE could end up being a universal power supply system as the cables and connectors for it are the same all over the world. By contrast power sockets and plugs differ by country.'

This may be true, however not all places use PoE, so you would still have to lug around an injector that may not be compatible with the country you're in.
Also, what happens when more people convert to Gigabit? What if there's no Ethernet drop available, just WiFi?
Neat concept maybe, but somewhat behind the times IMHO.

Hmm... potentially useful for _certain_ devices (1)

Dejohn (164452) | more than 9 years ago | (#12383285)

It's not like we don't already have power outlets near our workstations. It's not like 15 watts is going to power your computer AND your monitor. So, who really cares? This article could have just as easily been titled "New energy-saving computer produced - now you can lower your electricity bill this summer!"


The general idea could apply, however, in situations where we already use PoE technology: places where it's a lot more convenient not to call the electritian in addition to the low voltage cabler. Like in the ceiling for access points and stuff. But... scheez... my WAPs already run Linux. What else do I need?

light travel weight (0)

Anonymous Coward | more than 9 years ago | (#12383309)

It would be amazing if all notebooks were built around this. It would finally result in a truly universal power adapter and probably cut down on the travel weight. i.e. no need to carry an ethernet cable - hotel already has one

Too Less Power to play around.... (2, Interesting)

fuddoo (880023) | more than 9 years ago | (#12383310)

Idea is great ! But doesnot seems to be practical with Computer having moitor,dvd drive,cd drive....etc. Even If we use USB device which is drawing power from the PC and ultimately from the network which can only supply a limited power. So no of USB devices connecting to the computer will also be very limited. Theoretically if a computer consumes Microwatts it can get power over wireless LAN...So no more Cables!

Bad Idea (1)

Detritus (11846) | more than 9 years ago | (#12383314)

Just because you can, doesn't mean you should.

While there are certain specialized applications where "power over X" is convenient, it shouldn't be used when normal power is available.

PoE: Purity of Essence? (1)

dlleigh (313922) | more than 9 years ago | (#12383347)

I was thinking this might be some sort of companion software to CRM114 [sourceforge.net] .

So many projects, so few acronyms.

Nice idea, but... (2, Insightful)

Cyn (50070) | more than 9 years ago | (#12383349)

an ethernet plug is a lot more fragile and prone to 'not snapping in properly' than your average power plug. If some critical control system is powered properly, and disappears from the network, you plug it back in. If it was getting power over that same cable, it now has to boot back up, reinitialize, and figure out where it left off.

Don't get me wrong, it's a nice thought - but personally I've run into a fair variety of RJ45 jacks. Maybe this would finally snub out those people making the shitty ones, so I'm all for that.

I can't wait for that first DOS over powered IP (0)

Anonymous Coward | more than 9 years ago | (#12383356)

I cannot wait to see the possibility of actually being able to fry systems these are plugged into with a DDOS or a malformed power packet =).

What's next switch/surge protectors?

Also think of how lackluster some of the networks you have seen are. Then realize there is live power going over them.

Also wasn't there a time we were told to keep cables away from electrical devices and laughed at people who ran cables over flourescent lights in the drop ceilings. Now the power is running through them. Who'da thunk it?

The REAL solution (2, Insightful)

zakezuke (229119) | more than 9 years ago | (#12383367)

Establish a GLOBAL standard for power and just go with it. Why not just 12V DC, the already established standard for autos. PoE is such a mickey mouse solution as others have already pointed out will likely confuse people. Pick a plug... anything in the 10mm size should be just dandy.

Perhaps someone who has wired their house for low voltage would share their solutions. IIRC you couldn't have low and high voltage in the same gang box according to the NEC (National Electrical Code - USA), which is unfortunate as that would be the obvious way to get wall current and convert it to low voltage which is apparently a NO NO.

Maintaing PoE (0)

Anonymous Coward | more than 9 years ago | (#12383368)

You'll need to drink only distilled rainwater, because Chlorination is a communist plot. No Vodka either. You must maintain your Purity of Essence, if you want your devices to work.

Proprietary is Better... (2, Insightful)

sysadmn (29788) | more than 9 years ago | (#12383370)

for the vendor. What this overlooks is that there is a reason designers select proprietary power and data cable connections. It gives that vendor a head start in selling you all the other useful things that plug into that port. The worst offenders are cell phone and pda makers. Notebook vendors are almost as bad. Commodity players might have a reason to adopt a standard to drive costs down, but lots of others do not.

What problem does this solve? (0)

Anonymous Coward | more than 9 years ago | (#12383374)

If you can plug in a cat5, you can damn near always plug into the 50/60Hz standard AC power anyway.

And that AC power will deliver enough juice to allow you to actually do something with your box. What the heck can you do with 15 watts anyway? Lighting up all your disk LEDs at the same time would probably melt the cat5 anyway.

Apple's power thru firewire (3, Insightful)

adzoox (615327) | more than 9 years ago | (#12383402)

I've always liked the iPod ACs that used firewire cables to charge the iPod & thought Apple (to save money and promote firewire) should standardize all their ACs to this spec and same look.

Great, but... (1)

Phu5ion (838043) | more than 9 years ago | (#12383418)

Will it play Half Life 2?

What we really need is... (0, Redundant)

JustNiz (692889) | more than 9 years ago | (#12383436)

A wifi version :-)

PoE? What about EoP? (2, Funny)

WaterBreath (812358) | more than 9 years ago | (#12383441)

Wait a minute! I thought the next big thing was ethernet over power, not power over ethernet!

What's going on!?

Oh no... I've entered some sort of "Bizarro World" haven't I??? A world where technologies are turned backwards and inside out without warning! What a terrifying prospect!

distance limit? (1)

radarsat1 (786772) | more than 9 years ago | (#12383455)

It's a very cool idea, but I don't know much about PoE so take this with a grain of salt... if you're putting out DC power over a network cable, won't it be quite limited in the distance it can go?

However the idea of carrying around a battery-less computer and just plugging it into a network is kind of interesting..
Though I'm having a hard time thinking of *serious* advantages.
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