Ali The scope of our study group is to define PHYs – not the DWDM network. Gary’s picture is helpful to refer to - http://www.ieee802.org/3/B10K/public/adhoc/17_1212/nicholl_b10k_01_171212.pdf. As you see in this instance the output of the mux is not at TP2. John From: Ali Ghiasi [mailto:aghiasi@xxxxxxxxx]
Sent: Thursday, December 14, 2017 4:24 PM
To: John D'Ambrosia <jdambrosia@xxxxxxxxx>
Cc: STDS-802-3-B10K@xxxxxxxxxxxxxxxxx
Subject: Re: [802.3_B10K] Terminology Kickoff John The output of the Mux may carry non-Ethernet traffic that is correct, but for successful DWDM transmission you need to test Mux output for spectral content and OSNR. So what do you call the interface at DWDM Mux output, MDI2? Thanks,
Ali Ghiasi
Ghiasi Quantum LLC The output of the mux wouldn’t be the MDI – as that is all of the links – with some of them maybe not even ethernet. In case of DWDM network, MDI could be defined to be at the output of single module/port or the MDI could be after EDFA/Mux carrying traffic from several ports! Thanks,
Ali Ghiasi
Ghiasi Quantum LLC I guess the same would be true for the MDI – as we are talking about a module connection – so the MDI should be obvious also. Specifically in regard to DWDM network probably PMA and PMD are self explanatory. Thanks,
Ali Ghiasi
Ghiasi Quantum LLC What is the issue with PMA and PMD in relation to the DWDM network? From an IEEE perspective – they are two well defined terms, and i have not heard any confusion about this in relation to the discussion underway. I would also add the following to the list: Thanks,
Ali Ghiasi
Ghiasi Quantum LLC All,
As discussed on this week's ad hoc call, there is a need for us to spend
some time on terminology related to the proposed PHY over DWDM network, .
Establishing a common reference point for various terms will enable
effective discussions in our group and the industry.
To that end - I am kicking off this thread to try and identify the terms
that we feel need defined related to this topic. This will also serve as
input into a potential liaison to the ITU-T, where we will request their
respective definitions of these terms.
Terms identified so far include the following (alphabetical order)
* Channel
* DWDM
* In-line amplification
* Lambda
* Lane
* Link
* PHY
* Point-to-point link
* Signal
Regards,
John D'Ambrosia
Acting Chair, IEEE 802.3 Beyond 10km Optical PHYs Study Group
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