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Re: [802.3BA] 802.3ba XR ad hoc next step concern


According to data presented over the last several meetings, I would
offer the following:

100m over MMF: 1x
150-200m over MMF: 1.2x
10km over SMF 8-12x

The reason people still invest money in multimode fiber is because it is
the most cost effective optical choice for short lengths (< 300m) 

Best regards,


-----Original Message-----
From: Mikael Abrahamsson [mailto:swmike@xxxxxxxxx] 
Sent: Wednesday, August 27, 2008 1:34 PM
To: STDS-802-3-HSSG@xxxxxxxxxxxxxxxxx
Subject: Re: [802.3BA] 802.3ba XR ad hoc next step concern

On Wed, 27 Aug 2008, Dove, Daniel wrote:

> Perhaps you can provide a chart that shows the distribution of lengths

> and the relative costs associated with them, and we can use that as 
> the basis for further understanding? I know that this data has been 
> presented in various presentations, but a nice succinct chart would be

> helpful.

I'm also interested in the cost difference between 100m, cost for an MM
optic that'll do 150-200m, and if the optic that does 10km over SMF is
applicable for the 200m MM case (like it is with 10GBASE-LX4 and
1000BASE-LX for instance), and if it is, what's the relative cost with
that included.

On a personal note, I still don't understand why people invest a lot of
money in MM cabling when SM is around :P It's obvious that to use MM
with price-efficient optics, each hike in speed seems to shorten the
reach in MM fiber.

Mikael Abrahamsson    email: swmike@xxxxxxxxx