I think you are referring to how once a collision is detected, the transmitting stations continues to transmit for a set amount of bit time so that all machine in the collision domain will be made aware of it. -Chris W. On Fri, 9 May 2003, Tace wrote: > Hi, > I am not too sure about the presence of this jamming signal in practical world, but I was taught it exist during my basic networking course. > > Tace > > On Thu, 8 May 2003 11:07:33 > Darrell A. Escola wrote: > >On Thu, May 08, 2003 at 01:19:48PM +0200, Hagen Paul Pfeifer wrote: > >> * Tace | 2003-05-08 07:52:50 [+0700]: > >> > >> >Hi, > >> > What's Ethernet Jamming Signal? > >> > >> Sorry, my failure! > >> > >> CSMA/CD - Jamming Signal > >> > >> When a controller detects a collision on the wire he sends a jamming signal. > >> All nics in the segment now realize that a collision take place. > >> I hope that some nics provide some statistic informations!? > >> > >> >Tace > >> > >> Hagen > >> > >> -- > >> Universe.SYS corrupted. Reboot? [Y/N] > >> - > >> : send the line "unsubscribe linux-net" in > >> the body of a message to majordomo@vger.kernel.org > >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > > >My understanding of CSMA/CD collision detection is that NIC's operating in > >half-duplex mode listen while transmitting, detecting a foreign transmission > >during that time as a collision - any other NIC's transmitting during that > >period should likewise detect the collision. Any full-duplex links _should_ > >be unaffected, depending on switching mode (cut-through, fragment-free, > >store-and-forward) - switches should buffer the frames, dropping invalid > >frames. > > > >I do not believe there is a "jamming signal" - frames involved in a > >collision will be damaged and dropped. > > > >-- > >Darrell A. Escola, CCNA, Linux+ > >- > >: send the line "unsubscribe linux-net" in > >the body of a message to majordomo@vger.kernel.org > >More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > > ____________________________________________________________ > Get advanced SPAM filtering on Webmail or POP Mail ... Get Lycos Mail! > http://login.mail.lycos.com/r/referral?aid=27005 > - > : send the line "unsubscribe linux-net" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > > - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
