[AusNOG] 100G/200G/400G coming down the pipe (so to speak)

[Darren Ward (darrward)]

Using 2 or 4 waves for 100G is a very very bad way to do it and is only looked at by vendors who don't have a real 100G transmission solution so they just convert the short haul multilane 'lanes' into separate channels for transmission

100G MH/LH/ULH DWDM is single 50GHz lambda which is the efficiency difference, one optic, one channel vs 10x10G waves and 10x10G optics which is the cost benefit Matthew mentions

I hate mentioning anything vendor on this list and so will keep it to technology specifically so a couple of vendors use coherent optics in a way called CP-PMQDSPK for example to run a single channel 100G 50GHz wavelength. 

Still cheaper than 10x10G despite adding the coherent DSP...

Darren

-----Original Message-----
From: ausnog-bounces at lists.ausnog.net [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Ben Dale
Sent: Thursday, 8 March 2012 11:19 AM
To: Matthew Moyle-Croft
Cc: ausnog at ausnog.net; Paul Brooks
Subject: Re: [AusNOG] 100G/200G/400G coming down the pipe (so to speak)

On 08/03/2012, at 9:32 AM, Matthew Moyle-Croft wrote:

> 
> On 08/03/2012, at 9:53 AM, Ben Dale wrote:
>> touché!  
>> 
>> So to recap, that's large mountains of cash being burned through by 100G lambdas , being burned through by annoying sub-rate services...
>> 
>> Pretty much sums up all optical really : P
> 
> My understanding is that it's now cheaper to use 100G DWDM LH to carry nx10G than to do 10G natively.   Don't fully understand why, but I suspect that even though 100G is still relatively expensive, it's still less expensive than 10x 10G DWDM LH.  This fact is driving the take up on 100G, not just the higher data rates etc.  If you're leasing pairs on a long haul system (as is possible in, say, the USA) then the data rates are important as you don't want to lease another pair and have to put amplifiers in the huts along the path as it adds considerably to the cost, where as AU has a very different market arrangement with just a few players.

That's interesting to hear - in the (albeit limited) space we play (intra-DC, minimal amplification/re-gen, 70-80% of customers under 80km), this tipping point hasn't really occurred yet.

Spectrally it's 4 lambdas vs. 10 so the amplification difference is marginal in these shorter hauls, but it's the 100G transponders that still seem quite astronomical compared to the standard 10G transponder/dense-wave XFP combo.

Ben


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