This handbook is intended to accompany or incorporate AS5643 IEEE-1394b Interface Requirements for Military and Aerospace Vehicle Applications, AS5643/1 S400 Copper Media Interface Characteristics over Extended Distances, AS5657 Test Plan/Procedure for AS5643 IEEE-1394b Interface Requirements for Military and Aerospace Vehicle Applications, AS5706 Test Plan/procedure for AS5643/1 S400 Copper Media Interface Characteristics Over Extended Distances, and ARD5708 Frequently Asked Questions about IEEE-1394b and SAE AS5643. In addition, full understanding of this handbook also requires knowledge of IEEE-1394-1995, IEEE-1394a and IEEE-1394b standards. This handbook contains detailed explanations and architecture analysis on AS5643, bus timing and scheduling considerations, system redundancy design considerations, suggestions on AS5643-based system configurations, cable selection guidance, and lessons learned on failure modes.