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In data networking and transmission, 64b/66b is a line code that transforms 64-bit data to 66-bit line code to provide enough state changes to allow reasonable clock recovery and alignment of the data stream at the receiver. It was defined by the IEEE 802.3 working group as part of the IEEE 802.3ae-2002 amendment which introduced 10 Gbit/s Ethernet. At the time 64b/66b was deployed, it allowed 10 Gb Ethernet to be transmitted with the same lasers used by SONET OC-192, rather than requiring the 12.5 Gbit/s lasers that were not expected to be available for several years.

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  • 64b66b-Code (de)
  • 64b/66b encoding (en)
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  • In data networking and transmission, 64b/66b is a line code that transforms 64-bit data to 66-bit line code to provide enough state changes to allow reasonable clock recovery and alignment of the data stream at the receiver. It was defined by the IEEE 802.3 working group as part of the IEEE 802.3ae-2002 amendment which introduced 10 Gbit/s Ethernet. At the time 64b/66b was deployed, it allowed 10 Gb Ethernet to be transmitted with the same lasers used by SONET OC-192, rather than requiring the 12.5 Gbit/s lasers that were not expected to be available for several years. (en)
  • Der 64b/66b-Code ist ein Leitungscode, welcher ein 64 bit-Datenwort in ein 66 bit-Codewort abbildet. Anwendung findet dieser Leitungscode im Rahmen von Gigabit-Ethernet, wie 10-Gigabit-Ethernet, 40-Gigabit-Ethernet und 100-Gigabit-Ethernet. Der 64b/66b-Leitungscode ist völlig anders aufgebaut und hat andere spektrale und statistische Eigenschaften als z. B. der 8b10b-Code. (de)
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