| Thread Links | Date Links | ||||
|---|---|---|---|---|---|
| Thread Prev | Thread Next | Thread Index | Date Prev | Date Next | Date Index |
Frank, I would really prefer if we could have WDM coexistence between these systems, if that was possible. If it is not possible (not enough space in O-band), it would be ideal to have TDMA coexistence with 25G only and avoid 50G and 100G devices having to support this mode. Does it make sense? I think with the proper wavelength selection, we could avoid it altogether, and allow for WDM coexistence, as long as we do not have to worry with 1G-EPON. Marek From: frank effenberger [mailto:frank.effenberger@xxxxxxxxxx] Marek, I have a question on something you said here. You said, “reuse of 1260-1280 band for NG-EPON would block the coexistence / backward compatibility with 10G-EPON”. That is true if you assume that we are going to use WDMA (wavelength muxing) to combine the 10GEPON and 100GEPON. But, there have been some folks that have talked about using TDMA coexistence. Do you discount that possibility? Just trying to understand where you’re coming from.
Frank E. From: Marek Hajduczenia [mailto:marek.hajduczenia@xxxxxxxxx] Francois, Just one note: we are already using 1260 – 1280nm band for 10G-EPON. XGS-PON is nothing more than 10G-EPON in disguise (yes, they did change a few things at logical layer, so what). I am not sure though what point you’re trying to make – reuse of 1260-1280 band for NG-EPON would block the coexistence / backward compatibility with 10G-EPON, which is one of our goals for the project. If we forgot backward compatibility with 1G-EPON, we have plenty of real estate in O band to work with, without the need to kill off compatibility with 10G-EPON. Marek |