20 ppm clock tolerance for WIS
Gary, Howard:
For the benefit of those who could not make it to your presentation in
Ottawa, could you clarify some of the issues that you raise.
http://grouper.ieee.org/groups/802/3/ae/public/may00/nicholl_1_0500.pdf
You mention that the "cost difference between +/-20ppm and +/-100ppm
oscillators is a tiny fraction of the total cost of a 10GigE interface".
Could you perhaps substantiate this statement with quantitative input (some
real numbers). My understanding is that the +-100ppm tolerance was
specified only to keep the cost down (as the cost differential between a
20ppm solution and 100ppm solution is perceived to be significant).
You recommend using "LAN PHY jitter specs". This makes the WIS
incompatible with installed base SONET . This doesn't seem to meet your
goal of being compatible with installed OC-192 SONET
infrastructure. Please clarify.
-Praveen