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Ali, My apologies, I made a cut and paste error from the off-line email thread. In the last line of my previous email, I should be reworded the interface designations as in the below sentence. “Based on this, we can conclude that the cost cross-over point for parallel MMF SR4 solution to duplex SMF LR4 solution is ~400m. This is consistent with your experience that several of your customers would like to push the SR4 link reach beyond 100/150m.” Chris From: Chris Cole Hi Ali Because of some off-line consensus building discussions, I happen to have the LightCounting numbers and calculations for 40GE module cost ratios which may be of interest to the Study Group.
I will also assume a MTP terminated 8x parallel MMF to LC terminated duplex SMF cost ratio of 4x. Based on this, we can conclude that the cost cross-over point for parallel SMF solution over WDM duplex SMF solution is ~400m. This is consistent with your experience that several of your customers would like to push the SR4 link reach beyond 100/150m. Chris From: Ali Ghiasi [mailto:aghiasi@xxxxxxxxxxxx] John Talking to several customers they are saying they are currently deploying 40G-SR4 with 100 m reach on OM3 or 150 m on OM4, they want to support the same reach on 100G-SR4. Due to high cost of 40G-LR4 optics, in some case the 40G-SR4 links in proprietary application are pushed beyond 100/150 m reach, I expect you might have seen similar requests. Thanks, Ali On Jan 16, 2012, at 10:46 AM, John Petrilla wrote: Hello Jeff Thanks for the kind word. Regarding the two conclusions on page 2, the second, “A 100 m OM4 …” is intended to include MMF cabling cost. While I may not have reliable data on the relative costs of 100 m of OM4 OM3, I believe reducing the fiber count from 20 to 8 covers a large range of premium. I will try to clarify my intent. Thanks again, John From: Jeffery Maki [mailto:jmaki@xxxxxxxxxxx] John, Great effort. On your slide 2, can you make clear whether your conclusion includes the MMF cabling cost? Jeff From: John Petrilla [mailto:john.petrilla@xxxxxxxxxxxxx] Hello Jonathan Attached is a draft presentation prepared for the Newport Beach meeting. Although I’m not sure of my schedule/availability for Tuesday morning, I would appreciate feedback from any who care to offer some. Have MMF ad hoc conference contact details for Tuesday been distributed? Regards, John From: Jonathan King [mailto:jonathan.king@xxxxxxxxxxx] Dear all A reminder that there will be an MMF ad hoc meeting on Tuesday 17th Jan 2012, from 8am to 10.30 am PCT, in order to minimize the overlap with a concurrent OIF meeting. If you have material to present, please let me know before hand. Thanks Jonathan +1 408 368 3071 |