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

[Yin To Chu]

People are still developing higher speed optical interfaces for MMF.

http://ix.br/ixforum/9/slides/ixbr9-finisar.pdf

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On Thu, Apr 7, 2016 at 10:41 AM, Skeeve Stevens <
skeeve+ausnog at eintellegonetworks.com> wrote:

> 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
> Email: skeeve at eintellegonetworks.com ; Web: eintellegonetworks.com
>
> Cell +61 (0)414 753 383 ; Skype: skeeve ; LinkedIn: /in/skeeve
> <http://linkedin.com/in/skeeve> ; Expert360: Profile
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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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>>
>
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