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RE: [10GBASE-T] September interim meeting


I agree that the issues you raised must be addressed by November. One of the biggest challenges for this group is to establish reality on technical feasibility on Cat7, Cat6 and Cat5e channels.  Different vendors have different conclusion on Technical feasibility. That is due to assumptions on alien cross talk mitigation techniques, impact on implementation impairments on SNR, channel model, coding gain, and analysis on chip complexity in a given process. Assumptions must be stated clearly by vendors that present technical feasibility. In this case, technical feasibility drives the broad market potential.  Technical feasibility must be addressed at least based on the following criteria:

1. Achievable distance on Class D channel with and without installation mitigation techniques.
2. Achievable distance on Class E channel with and without installation mitigation techniques.
3. Transceiver complexity in terms of estimated power dissipation and realistic targets for building blocks like ADC, PLL and etc 2-3 years from now.

We reached a conclusion that cat7 cable or class F channel has high enough capacity for 10Gbps operation.  But, can a transceiver be built with reasonable power dissipation and cost say in 90nm process or finer geometries to achieve broad market potential?

We need to keep in mind that customers have fiber and CX4 as alternatives.


At 01:08 PM 7/30/2003 -0600, wrote:
Generally, when the group can agree on clear objectives, then they can finish the rest of the work. Fuzzy objectives often indicate a lack of real concensus.
In November, I will also be expecting arguments that support the 5 criteria based on the objectives -
Broad market potential - evidence that there will be a broad market the minimum requirements of the objectives are met.
Technical feasibility - is it feasible to meet those minimum requirements
Economic feasibility - when you have met the minimum requirements will cost be suitable to make it a viable product in the markets?
In the discussions at the plenary, a power consumption issue was raised by some of the speakers.
If the broad market potential is based in part on use in devices such as end nodes (including servers in data centers), then an objective for power consumption such that this can reside in server card formats would be important. Can it fit within the power constraints of a PCI Express board and an Infiniband board (remembering that one has to allow some power for the MAC and probably TOE/RDMAP engine)?
Looking at the objectifves in agenda_1_07_03, I don't see any that address power consumption or the abilitiy to live on server card formats. In a quick search, I also didn't find any material on power consumption in the presentations that have been made to the study group. I hope that in September the group will address the issue of power.
-----Original Message-----
From: Bruce Tolley []
Sent: Monday, July 28, 2003 1:22 PM
To: Booth, Bradley;
Subject: Re: [10GBASE-T] September interim meeting


Thanks for the follow up.

I am confident that if we can agree on crisp, clear objectives for 10 Gbps reach and media supported in September that we can get our PAR approved and move into Task Force mode, which is where the real work begins.


At 06:35 PM 7/24/2003 -0700, Booth, Bradley wrote:

Study Group Members,

Just to let others that were not at the meeting know the outcome of the 802.3 Working Group meeting, the Study Group will have to complete its PAR, 5 Criteria and Objectives in November.  This gives the Study Group the task of completing the PAR, 5 Criteria and Objectives in 4 months.  This will make our September Interim meeting extremely important.  We will need to complete the effort as much as possible to pre-submit to the 802.3 Working Group prior to the November Plenary.  November will permit us the ability to modify the PAR, 5 Criteria and Objectives prior to asking 802.3 to put the PAR on the NesCom agenda.  The September Interim meeting will focus on the completion of our PAR, 5 Criteria and Objectives.

Chair, 10GBASE-T Study Group

Bruce Tolley
Senior Manager, Emerging Technologies
Gigabit Systems Business Unit
Cisco Systems
170 West Tasman Drive
San Jose, CA 95134-1706
ip phone: 408-526-4534

"Don't put your hiking boots in the oven unless you plan on eating them."

Colin Fletcher, The Complete Walker

Nariman Yousefi
Vice President Networking Engineering

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