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krisi
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Re: Tech insights?
krisi   11/6/2013 10:42:32 AM
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Rick, there is probably not much inside the ASICs...the whole concept of software defined networks is that switch can be very simple like a cross-bar, has tons of very high speed IOs and all packet processing functions are done in very faast processor outside the switch core...we are moving back to cheap but dumb switches...Kris

rick merritt
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Tech insights?
rick merritt   11/6/2013 10:37:38 AM
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Anyone have any insights into what's inside the new ASICs, 40G optical modules, couplers or other silicon in the switches?

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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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