Re: [FE] Website updated
Kevin,
I believe that most implementations of the EFM over DSL links will use
the new version being defined in ITU-T Q4/15. It is based very closely
on the 802.3ah definition but is generalized for use over any DSL. It is
important that we make the ITU group aware of the impact of the frame
extension effort so that devices being specified and designed according
to the recommendation in progress now will accommodate the larger frame
size. I will make a personal effort to publicize the frame extension
effort to Q4/15 when the group meets later this month.
Hugh,
Kevin Daines wrote:
>Pat,
>
>You are correct. While I sent out the request multiple times for research about EFM links and FEC links the reflector audience was admittedly limited. I did receive informal responses from two EPON silicon vendors but no presentations.
>
>We won't be choosing the new max frame size at this week's meeting. The November 2004 meeting will be the earliest I could conceive that we'd settle on a new size. There is still time to consider the impact to existing technologies.
>
>I think the material presented in July and at this week's meeting will provide sufficient justification for a project and allow us to proceed.
>
>Kevin Daines
>Chair, 802.3 Frame Expansion Study Group
>
>
>
>
>-----Original Message-----
>From: pat_thaler@agilent.com [mailto:pat_thaler@agilent.com]
>Sent: Tuesday, September 28, 2004 1:39 PM
>To: Kevin Daines; STDS-802-3-FE@listserv.ieee.org
>Subject: RE: [FE] Website updated
>
>
>It looks like one area not yet covered is impact on the new EFM devices -
>The twisted pair physical layers, 10PASS-TS and 2BASE-TL there send frames onto a physical layer with a data rate much slower than the attached MAC. Therefore they have to buffer most of the frame. The amount will be proportional to the frame size.
>
>EPON PHYs doing FEC have to buffer amounts proportional to the frame size. The transmitter has to buffer 16 parity bytes * frame size MOD 239. The receiver has to buffer the whole frame so it can do the error detection and correction when it receives the FEC bytes.
>
>Pat
>
>-----Original Message-----
>From: **** IEEE 802.3 Frame Expansion Study Group ****
>[mailto:STDS-802-3-FE@listserv.ieee.org]On Behalf Of Kevin Daines
>Sent: Monday, 27 September, 2004 12:37 PM
>To: STDS-802-3-FE@listserv.ieee.org
>Subject: [FE] Website updated
>
>
>All,
>
>The 802.3 Frame Expansion Study Group website has been updated. All of the materials for the upcoming interim are included. In addition, there is a single zip file containing all of the materials.
>
>http://www.ieee802.org/3/frame_study/index.html
>
>Hope to see you on Thursday.
>
>
>Kevin Daines
>Chair, IEEE 802.3 Frame Expansion
>
>
>