VSC6134
Datasheet
2.15.4
FEC Bridge Modes
There are two FEC Bridge modes:
●
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StFEC(S) <-DWOH (without payload processing) to LFEC(S), 1/1
StFEC(NS) <-DWOH (without payload processing) to LFEC(NS), 1/1
The following figure shows the FEC Bridge or Regenerator mode with on-chip DWOH processing and
without payload processing. In the add direction, the StFEC signal is framed, decoded, and optionally
corrected; DWOH performance monitoring is performed; and the DWOH is terminated or passed
through. New DWOH is then inserted as required, and the LFEC parity bytes are recalculated and
added. In the drop direction, the LFEC signal is framed, decoded, and optionally corrected; DWOH
performance monitoring is performed; and the DWOH is terminated or passed through. New DWOH is
then inserted as required, and the StFEC parity bytes are recalculated and added. The StFEC(S) to
LFEC(S) mode supports the optional extraction of the OTU stuff bytes received in the add and drop
directions and the insertion of the OTU stuff bytes transmitted in the add and drop directions.
Figure 38. StFEC to LFEC Bridge Without Payload Processing Mode
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VMDS-10185 Revision 4.0
July 2006
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
