256B datasheet(3/21 Pages) IBM

Part #	256B

Description	256b/257b Transcoding for 100 Gb/s Backplane and Copper Cable

PDF	21 Pages

Scroll/Zoom	100%

Manufacturer	IBM [IBM]

Direct Link	http://www.ibm.com

Logo

3 / 21 page

256b/257b Transcoding for 100 Gb/s Backplane and Copper Cable

IBM

Introduction

512b-based transcoding (TC)

− 512b/513b TC scheme for 40 Gb/s ethernet: trowbridge_01_0707.pdf

− 512b/513b TC scheme for 100 Gb/s ethernet backplane and copper cable:

cideciyan_01a_0911.pdf

− 512b/514b TC scheme for 100 Gb/s ethernet: a) Teshima et al. “Bit-Error-Tolerant

(512*N)B/(513*N+1)B Code for 40Gb/s and 100Gb/s Ethernet Transport”, INFOCOM

2008, b) cideciyan_01a_1111.pdf, c) wang_01a_1111.pdf, d) gustlin_01_0112.pdf and

e) brown_01_0112.pdf

The granularity of 256b-based TC simplifies processing of alignment markers:

gustlin_01_0312.pdf

256b/257b TC with reshuffling: FEC Proposal for NRZ-Based 100G-KR Systems, Broadcom,

Feb. 8, 2012.

A proposal is shown for 256b/257b transcoding w/o reshuffling that can be used for both

NRZ and PAM4 signaling

256B Datasheet(PDF) 3 Page - IBM