Retraining Sequence

Station A

Station B

* Sends dbf

* Receiving party failed to correctly receive dbf

* Check STICKY bit counter. If not exceeded:

* Continue to send dbf

- OR -

* Receives dbf

* responds with dbf

* If STICKY bit count has been exceeded:

DEASSERT LOCK, RLOCK

* Sends abf

* Ignores dbf (after retraining has started.)

* Continue to send abf

* Receives abf - loss of data frame

* Check STICKY bit counter. If not exceeded:

* Continue to send dbf

* STICKY bit counter exceeded.

* initiates training sequence

DEASSERT LOCK. RLOCK

* Base unit takes over at this point

* Sends abf

Unlocking & Relocking

Relocked

Unlocked

* Base unit takes over at this point.

* Standard training sequence starts

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