In message <[email protected]>, dated Fri, 18 May 2007, "Kim, Ben" <[email protected]> writes:
>However, 10Mbps/100Mbps uses only 2 pair (4 wires) although the number >of wires are 8. Since unused wires are not considered as "balanced >pair", >it would be still acceptable to use 2 pair (4 wires) balanced ISN for >10/100Mbps mode per 9.6.3.1 It may be acceptable in terms of the standard, but the presence of 'floating' wires in the cable is liable to result in malfunction, which is what has been reported in this case. Exactly what damage (and how) the floating wires do is not clear to me, but.... -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk There are benefits from being irrational - just ask the square root of 2. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
