[AusNOG] Multi-Mode vs. Single-Mode in DC's

[Skeeve Stevens]

Also, for a long time, on short runs we've used LX optics, which use MMF or
SMF... so we didn't actually care.


...Skeeve

*Skeeve Stevens - Founder & The Architect* - eintellego Networks Pty Ltd
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On Thu, Apr 7, 2016 at 10:28 AM, Nik Geyer <nik at neko.id.au> wrote:

> MMF optics may be cheaper but they are one component of a greater TCO
> equation, e.g. I need to burn 12 cores of MM for 40GE (excluding BiDi)
> which has associated cabling costs (structured runs, termination, FOBOT's
> and so on). I'm also not sure if anything has changed but it was virtually
> impossible to get MPO pre-term patch leads in Australia for the first six
> months of last year, so I couldn't even connect my shiny 40GE optics to
> anything!
>
> SMF for inter-rack to /easily/ support 40/100GE, DAC for Intra-rack.
>
> Sent from my iPhone
>
> On 6 Apr 2016, at 8:22 PM, Jonathan Brewer <jon.brewer at gmail.com> wrote:
>
> Hi Skeve,
>
> On 7 April 2016 at 12:04, Skeeve Stevens <
> skeeve+ausnog at eintellegonetworks.com> wrote:
>>
>> I wanted to put a question to the community to help some University
>> researchers.
>>
>
> In the first instance, direct them to the Fibre Optic Association's
> YouTube channel https://www.youtube.com/user/thefoainc as it's the best
> resource available for learning about fibre and optics.
>
>
>> They are wanting to know how much, in DC's particularly people rollout
>> MMF vs. SMF
>>
>
> Data centre people still roll out Multimode. Companies still regularly
> roll out Multimode on campus networks. I don't agree with the practice, but
> it happens.
>
> They're working on a technology to extend the capacity of Multi-Mode, to
>> the speeds of Single-Mode - and want to know if there is a market for it.
>>
>
> There's never been a lack of speed for Multimode - only a lack of distance
> due to modal dispersion.
>
> My gut however was that for a while, not many people bother rolling out
>> MMF as the costs are rather similar when you compare it against comparable
>> features.
>>
>
> Multimode optics are less expensive to manufacture than singlemode optics.
> While prices have converged at 1gbps, you'll find at 10, 25, 40, and
> 100gbps the cost of multimode is half or a quarter of singlemode.
>
> -JB
>
>
>>
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