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pawpaw
Anon
2012-Nov-7 8:58 am
FTL?2,000 times faster than the speed of light? So ping times will arrive before they are sent? Sign me up! High speed trading here I come! | |
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Re: FTL?said by pawpaw :2,000 times faster than the speed of light? So ping times will arrive before they are sent? Sign me up! High speed trading here I come! Indeed. This will totally ruin my Pandora experience. Generally, I like to put on music based on my mood. But with these kinds of speeds, the music will be informing me what my mood will be in the future. I hate services that screw with my understanding of cause and effect. | |
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1 recommendation |
A step back?Isn't Cisco already transporting @ 25gbps per lambda with the 100Gbps LR4 module on the CRS platform? As far as I know, 100Gbps per lambda is already reachable and fast becoming the norm.... | |
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| aefstoggaflmOpen Source Fan Premium Member join:2002-03-04 Bethlehem, PA Linksys E4200 ARRIS SB6141
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Re: A step back?said by cablegeek01:Isn't Cisco already transporting @ 25gbps per lambda with the 100Gbps LR4 module on the CRS platform? As far as I know, 100Gbps per lambda is already reachable and fast becoming the norm.... And what about the cost and power? They are making so that it cheaper and uses less power. | |
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Re: A step back?And they are saying they are doing it without increasing fiber strands.
"While other fiber researchers examine technology that would increase the number of fiber strands....."
You can do hundreds of gig if you multiplex it all together. Their point is that they want to be able to increase the effectiveness of one strand. | |
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Re: A step back?said by Skippy25:And they are saying they are doing it without increasing fiber strands.
"While other fiber researchers examine technology that would increase the number of fiber strands....."
You can do hundreds of gig if you multiplex it all together. Their point is that they want to be able to increase the effectiveness of one strand. That's somewhat erroneous. Most manufacturers are already working towards/doing higher data rates per lambda (fiber wavelength). Multiple lambdas per fiber (CWDM and DWDM) have been around for many, many years. In most cases, you don't lease dark fiber, you lease a wavelength on transport circuits. Leveraging OFDM to increase the data rate per lambda is an interesting concept, especially if they're revamping their FEC method like DOCSIS 3.1 is planning, but I'd like to learn more about how they plan to do it. | |
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| | | | CXM_SplicerLooking at the bigger picture Premium Member join:2011-08-11 NYC |
Re: A step back?quote: That's somewhat erroneous. Most manufacturers are already working towards/doing higher data rates per lambda (fiber wavelength). Multiple lambdas per fiber (CWDM and DWDM) have been around for many, many years.
Exactly. One of the projects I am involved in is a Tellabs ring using the 7100 series DWDM multiplexer. It will transport 44 different 10G circuits simultaneously over 2 fibers... the documentation says it will do 88 but we aren't using it in that application. That is 880 Gb/s (rounded of course) over a single strand. | |
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Regor48
Anon
2012-Nov-8 4:53 pm
Re: A step back?Not sure what's so ground breaking here, 40 or 80 channels depending on vendor (10Gbps each) are already deployed in the real world. Latency can't improve by deploying higher capacity links, more direct routing (less regen nodes, less distance) is the only way to improve pings. | |
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norbert26 Premium Member join:2010-08-10 Warwick, RI
1 recommendation |
empty your bank account faster then speed of lightAfter the sticker shock few will be able to afford it. Most take the lower / medium tiers offered now and its plenty for most households . A major business is another matter but they have high enough speeds available now for most. | |
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Re: empty your bank account faster then speed of lightIt won't target the end user. This type of tech will be deployed on the backend. | |
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Faster?Are they making the fiber faster(i.e. reducing latency) or increasing the bandwidth of the fiber? | |
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| LightS Premium Member join:2005-12-17 Greenville, TX |
LightS
Premium Member
2012-Nov-7 10:51 am
Re: Faster?As stated in the article, they are aiming for bandwidth, not latency. Latency is (for now) limited to the speed of light, and the speed at which everything can be converted (at fiber modules, transceivers, etc) | |
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| Paxio Premium Member join:2011-02-23 Santa Clara, CA |
to Richie12
They are making the bandwidth broader, not making the latency shorter. In particular, they are making existing fiber in the ground carry more traffic. That is really good news to fiber broadband providers (like us) because it vastly extends the traffic we can carry without needing to replace our expensive infrastructure -- the fibers in the ground and over your head! | |
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Seriously guys....The speed of light as we know it is light in a vacuum. Fiber does not run at that speed and can't because it is 1.) Not in a vacuum and 2.) Running across a cable that introduces some resistance. | |
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| JPL Premium Member join:2007-04-04 Downingtown, PA |
JPL
Premium Member
2012-Nov-7 2:19 pm
Re: Seriously guys....said by Skippy25:The speed of light as we know it is light in a vacuum. Fiber does not run at that speed and can't because it is 1.) Not in a vacuum and 2.) Running across a cable that introduces some resistance. Vacuum? Per Einstein, that's utterly irrelevent. The speed of light is fixed. Period. | |
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| | Paxio Premium Member join:2011-02-23 Santa Clara, CA |
Paxio
Premium Member
2012-Nov-7 5:14 pm
Re: Seriously guys....said by JPL:Vacuum? Per Einstein, that's utterly irrelevent. The speed of light is fixed. Period. Well... it's not quite that simple! Glass fibers have an index of refraction of about 1.5, which means the speed of light traveling in a glass fiber is 1.5 times slower than the speed of light in a vacuum. The speed of light in vacuum is though to be an absolute constant, per Einstein et. al. » en.wikipedia.org/wiki/Re ··· ve_index | |
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to JPL
said by JPL:said by Skippy25:The speed of light as we know it is light in a vacuum. Fiber does not run at that speed and can't because it is 1.) Not in a vacuum and 2.) Running across a cable that introduces some resistance. Vacuum? Per Einstein, that's utterly irrelevent. The speed of light is fixed. Period. huh?. It has different speeds through different mediums | |
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| | Netgear CM1000 Ubiquiti EdgeRouter ER-4 Ubiquiti U6-Pro
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to JPL
said by JPL:said by Skippy25:The speed of light as we know it is light in a vacuum. Fiber does not run at that speed and can't because it is 1.) Not in a vacuum and 2.) Running across a cable that introduces some resistance. Vacuum? Per Einstein, that's utterly irrelevent. The speed of light is fixed. Period. the famous speed of light number is actually when in a vacuum. when light travels through transparent objects, it will slow down. Just like when light travels through water it will slow down.. then when it's out of water it will speed back up again. Know your physics before posting. | |
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MaynardKrebsWe did it. We heaved Steve. Yipee. Premium Member join:2009-06-17 |
Don't worryThe big carrier ISP's will also increase your bill by 2,000 times so it's a wash in the end. | |
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antdudeMatrix Ant Premium Member join:2001-03-25 US |
antdude
Premium Member
2012-Nov-8 9:21 am
What about deploying into new areas?What about areas that still don't have fiber services like FIOS? | |
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anon423
Anon
2012-Nov-8 10:24 am
StatisticsAre made up 99% of the time? I'd really love to know where the 2,000 number is coming from....
Anyone by Comcast's Metro-E can get 10gbps links over a pair of fibers (20gbps full duplex). So 20gbps is a 2x improvement. Hardly anything newsworthy... | |
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