Hi, 8b/10b encoding is IBM patented encoding method. The benefits are: 1. DC balance 2. Bit synchronization is more easily 3. Error detection is improved 4. Control character can be distinguished from data characters Edi > -----Original Message----- > From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] > On Behalf Of Ravindra Johari > Sent: Thursday, February 02, 2006 11:09 AM > To: si-list@xxxxxxxxxxxxx > Subject: [SI-LIST] PHY PCS > > Hi Gurus, > > > Have a very generic question about Physical Layer Device. > > In the PCS i.e the Physical coding sublayer of the PHY Device why is the > 8b/10b encoding/decoding required. > > Why not the serial signals received by the MDI directly interfaced with > the > MAC without encoding/decoding?? > > > > Apologies, if this is not related to Signal Integrity... > > > > Thanks and Regards, > > Ravi.. > > > > > > > > > > > > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > List FAQ wiki page is located at: > http://si-list.org/wiki/wiki.pl?Si-List_FAQ > > List technical documents are available at: > http://www.si-list.org > > List archives are viewable at: > //www.freelists.org/archives/si-list > or at our remote archives: > http://groups.yahoo.com/group/si-list/messages > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu