PMC advances OTN with 400 Gigabit processor

Optical modules for the line-side are moving beyond 100 Gigabits to 200 Gigabit and now 400 Gigabit transmission rates. Such designs are possible thanks to compact photonics designs and coherent DSP-ASICs implemented using advanced CMOS processes. 

An example switching application showing different configurations of the DIGi-G4 OTN processor on the line cards. Source: PMC

For engineers, the advent of higher-speed line-side interfaces sets them new challenges when designing the line cards for optical networking equipment. In particular, the framer silicon that interfaces to the coherent DSP-ASIC, on the far side of the optics, must cope with a doubling and quadrupling of traffic.  

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OTN processors from the core to the network edge

The latest silicon design announcements from PMC and AppliedMicro reflect the ongoing network evolution of the Optical Transport Network (OTN) protocol.

"There is a clear march from carriers, led in particular by China, to adopt OTN in the metro"

Scott Wakelin, PMC

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