| reply to cablegeek01
Re: Cisco CRS with 100Gb line card Correct me if I am wrong, but those look like SC connectors on that fiber... Does that thing really only require 2 fibers to push 100G? I was under the impression that 100G used a total of 20 fibers for 10x 10G channels and typically used 2 ribbons of fiber with MTP connectors.
I've never seen anything of this magnitude though. Fastest I've worked with is 10G. |
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cramer
join:2007-04-10
Raleigh, NC
kudos:7 | DWDM, baby! Cisco 100GBASE CFP Modules Data Sheet |
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sk1939Premium
join:2010-10-23
Washington, DC
kudos:9 Reviews:
 ·T-Mobile US
| reply to Smokeshow
said by Smokeshow:Correct me if I am wrong, but those look like SC connectors on that fiber... Does that thing really only require 2 fibers to push 100G? I was under the impression that 100G used a total of 20 fibers for 10x 10G channels and typically used 2 ribbons of fiber with MTP connectors.
Back when 100G came out that was true, but it hasn't been the case with the advent of WDM and DWDM technology (pioneered I believe, with 40G ethernet). |
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cramer
join:2007-04-10
Raleigh, NC
kudos:7 | That's still true for "SR" (multimode fiber), but who's going to do 100G on MM???
(It's more likely to use the SR optic to make a single 100G interface 10x10G interfaces.) |
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 TomS_Git-r-donePremium,MVM
join:2002-07-19
London, UK
kudos:4
1 edit | reply to Smokeshow
said by Smokeshow:I was under the impression that 100G used a total of 20 fibers for 10x 10G channels There are a few ways to provide 100G, one as you say being 10x10G channels, either physical (using a ribbon fibre) or logical using multiple wavelengths over a single pair. Another is 4x25G in similar configurations.
It is also possible to 100G as a single channel, and Ive been involved in the deployment of some long haul transmission kit that is single wavelength 100G. On a DWDM line system with 80 channels, were talking 8tbit/sec. Thats some seriously sexy stuff.  |
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cramer
join:2007-04-10
Raleigh, NC
kudos:7 | I wasn't aware of anyone doing single lambda 100G. Who's the vendor/manufacturer for those optics? |
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TomS_Git-r-donePremium,MVM
join:2002-07-19
London, UK
kudos:4 | Alcatel-Lucent.
They arent "optics" as such, more trans/muxponders. |
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sk1939Premium
join:2010-10-23
Washington, DC
kudos:9 Reviews:
·T-Mobile US
| said by TomS_:Alcatel-Lucent.
They arent "optics" as such, more trans/muxponders.
I've seen some of the equipment (carrier hotels), never been able to lay hands on it though (not my specialty/repsonsibility). Are the mux's still on the large side, or have they managed to shrink it a bit? |
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TomS_Git-r-donePremium,MVM
join:2002-07-19
London, UK
kudos:4 | The ones Ive wroked with are the PSS-32 chassis, which is 19" wide an 13 or so RU (can just fit 3 of them in a rack). Ive worked more with muxponders than their transponders, and you can fit 5 of them in that chassis, so 50 x 10g = 500g line side per chassis x 3 = 1.5t per rack. Since the chassis is only about 300mm deep you can probably fit them front and back too.
Not sure if theres anything else more dense than that. |
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sk1939Premium
join:2010-10-23
Washington, DC
kudos:9 | The one's I saw were 1/2 rack, so they've either shrunk somewhat, or have a lower capacity. Still, the amount of speed you have at the carrier level is amazing, I wonder what the link utilization is. |
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