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

9

IBM

256b/257b Transcoding for DB-Only Payload

block payloads of DBs

DBk(64), k=1, 2, 3 and 4, indicates 64-bit block payload associated with DB #k

Transcoded blocks are sent from left to right (leftmost bit first, rightmost bit last). Header

No reshuffling of the order of data blocks after transcoding

DB1(64)

DB2(64)

DB3(64)

DB4(64)

DB1(64)

1

DB2(64)

DB3(64)

DB4(64)

Transcoding

(TC) at Tx

Inverse

Transcoding

(ITC) at Rx

Only Case: DB #1, DB #2, DB #3 and DB #4