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

[Justin M. Streiner]

On Mon, 13 Nov 2006, Mikael Abrahamsson wrote:

> 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?

Multimode fiber still makes sense in intra-building runs.  We normally run 
both singlemode and multimode to our IDF closets when we do new 
construction.

jms