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I donot know how to interpret your comment "in reality the number of people who need 300m is close to 0". Have you verified your statement with those folks who have spent so many years to develop the various LX4, LRM, SFP+ plus shipping the Xenpak, X2, XFP, SFP+ Modules and Systems associated to meet those specs.
Also I believe these folks well understood what they (or their customers) were looking for before investing money/time, i.e, there was a market or demand there, I believe the same for XR extended reach today.
My understanding the ad hoc group led by Alessandro/John is giving enough thoughts to address your concern to avoid amortize the cost.
From: Gourgen Oganessyan [mailto:gourgen@xxxxxxxxxxx]
Sent: Wednesday, July 09, 2008 8:02 PM
Subject: Re: [802.3BA] XR ad hoc Phone Conference Notice
Well, sadly that’s what has been happening in the 10G world, people are forced to amortize the cost of 300m reach (LRM), while in reality the number of people who need 300m is close to 0.
That’s why I am strongly in support of your approach of keeping the 100m objective as primary goal.
Frank, OM4 can add as much cost as it wants to, the beauty is the added cost goes directly where it’s needed, which is the longer links. Alternatives force higher cost/higher power consumption on all ports regardless of whether it’s needed there or not.
Phone: (630)-802-0574 (cell)
From: Jeff Maki