the 1394b spec is faster than 800Mbs.
from: <a href="http://www.e-insite.net/electronicnews/index.asp?layout=article&articleId=CA91031
[quote]IEEE 1394b allows extensions to 800Mbit/sec., 1.6Gbit/sec. and 3.2Gbit/sec., all over copper wire. It supports long-distance transfers to 100 meters over a variety of media: CAT-5 unshielded cable at 100Mbit/sec., existing plastic optical fiber at 200Mbits/sec., next-generation plastic optical fiber at 400Mbit/sec. and 50-micron mulitmode glass optical fiber at up to 3.2Gbit/sec. The improved speed and distance capabilities of 1394b result from two major improvements: overlapped arbitration and advanced data encoding.
The highly efficient bus arbitration scheme, known as BOSS (Bus Owner Supervisor Selector), implements overlapped, pipelined arbitration, so the arbitration protocol runs in parallel with data transmissions. This is different from the 1394-1995 and 1394a legacy versions, both of which alternate between data transmission and arbitration.The data encoding improvements are based on the 8B10B codes used by Fibre Channel and Gigabit Ethernet and add more robust control codes and scrambling of both data and control symbols. This scrambling results in much lower average emissionsmore than 20dB below unscrambled codes. Together, the two improvements are called the beta mode of operation to distinguish it from the 1394-1995/1394a legacy mode.<hr></blockquote>
[ 11-30-2001: Message edited by: zebu ]</p>