> Pardon my naivety, but how does '100 Mbit' relate to frequencies of 30 and 60 kHz? Is this 100 Mbit per week? (;-) > -- > Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
<snip> First, a little background on auto negotiation. The IEEE 802.3u 100BaseTX auto negotiation specification uses a modified version of the link integrity test defined for 10BaseT devices. The link integrity test for 10BaseT devices uses the Normal Link Pulse (NLP), a burst pulse every 16 (+/- 8) microseconds. For 10/100 Mbps auto negotiation, a Fast Link Pulse (FLP) is used. The FLP includes the same NLP burst every 16 (+/- 8) msec for backward compatibility plus additional pulses every 62.5 (+/- 7) microseconds. The FLP burst generates code words that are used for compatibility exchanges (duplex settings) between link partners. If a device (such as an Ethernet switch) sends FLP, but only receives NLP from it's link partner (such as a server or workstation), it will stop sending FLP and enable standard 10BaseT operation. I suppose you can figure out that the frequency for 100 Mbps link pulses is 62.5 kHz. If not, calculate 1/16 us. Second, I recommend refraining from sarcastic comments in this forum, since that doesn't seem it was about naivety. I was actually trying to help. Best regards, Neven ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
