[Cerowrt-devel] a smart SFP

[Sebastian Moeller]

Yes sorry,

in GPON you have the unit at the telco side, often called OLT (optical line termination/terminal or similar, which feeds the whole segment of up to ~128 remote terminals and receives data from all) the passive splitter (if any) and the remote customer units that are called either ONU or ONT, but that are just two names for the same unit (not sure who uses which nomenclature, the local incumbent seems to prefer ONU, but their marketing name is Glasfasermodem, which just translates to fiber-modem). Nomenclature seems ot be consistent for the whole PON family, so in XG-PON or XGS-PON the unit apparently still are called OLT and ONU/ONT. And given that PON requires some smarts and configurability of the ONUs these tend to be small computers in their own right with their own little (or not so little) OSes.

Regards
	Sebastian



> On Jan 13, 2022, at 15:38, Dave Taht <dave.taht at gmail.com> wrote:
> 
> And a gpon onu
> 
> https://www.fs.com/products/133619.html
> 
> On Thu, Jan 13, 2022 at 6:23 AM Sebastian Moeller <moeller0 at gmx.de> wrote:
>> 
>> That is similar to what happens in some GPON-ONT SFPs, some run a full small Linux distribution like OpenWrt inside.... though for ethernet that is unexpected.
>> This is also similar to SFP VDSL "modems" which likely run their own embedded OS as well inside the SFP package (at a time there was even a PCI VDSL2 "modem" that was actually running its own embedded system on the PCI board, IIRC, it pretended to the main computer to be an ethernet NIC).
>> 
>> Regards
>>        Sebastian
>> 
>> 
>> 
>>> On Jan 13, 2022, at 15:18, Dave Taht <dave.taht at gmail.com> wrote:
>>> 
>>> running linux, of course.
>>> 
>>> https://blog.benjojo.co.uk/post/smart-sfp-linux-inside
>>> 
>>> --
>>> I tried to build a better future, a few times:
>>> https://wayforward.archive.org/?site=https%3A%2F%2Fwww.icei.org
>>> 
>>> Dave Täht CEO, TekLibre, LLC
>>> _______________________________________________
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>> 
> 
> 
> -- 
> I tried to build a better future, a few times:
> https://wayforward.archive.org/?site=https%3A%2F%2Fwww.icei.org
> 
> Dave Täht CEO, TekLibre, LLC