[c-nsp] multimode Re: GLC-SX-MM and 50µm mm fiber

[Mikael Abrahamsson]

On Mon, 13 Nov 2006, Adam Greene wrote:

> deploying 62.5µm fiber but have been learning that 50µm is probably more
> forward-looking in terms of being able to support 10Gbps if we later upgrade

Hi. Sorry for hijacking your thread, but I was just wondering if someone 
could explain to me why one would ever want to deploy multimode cabling in 
new installations? To be forward-looking, I'd say single mode is the way 
to go. Then you know for a fact you can scale into at least 100G, most 
likely quite a lot more.

I realise that like 50% of cisco sales of optics is multimode, I just 
can't figure out why people do it for new cable installations. The price 
difference isn't that big, especially when you consider the cost of ODFs 
over a long time, where SM cabling should have a much longer lifespan?

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se