Mode C/E

20:11 Dec 31, 2019 

just realised that the answer I prepared was still in the draft stage - the additional context you added in the meantime confirmed it.

interface de données optique

interface de données optique D0
interface de données électrique
RS485, RS232 ou CL0

that's the description of the hardware to be used - RS232 was the standard serial port for personal computers before USB ports were introduced.

protocoles de données

IEC 62056-21 ou DLMS
taux de transmission maximale
jusqu’à 19200 baud (fixé ou Mode C/E)

description how data has to transmitted

18:46 Dec 31, 2019 

I think this contract is based on a French translation of an English document as there are a number of inconsistencies and omissions, and terms that have been misread. There is also very little context for a lot of the technical stuff and I'm going to suggest that a technical person reads over the translation to make sure that the technical stuff makes sense. There are several places where the ST is unclear.

18:43 Dec 31, 2019 

The whole section is a description or and specifications for metering.
These are all the line items from the part of the schedule relating to the data interfaces:

Interfaces de données [heading]
interface de données optique
interface de données optique D0
interface de données électrique
RS485, RS232 ou CL0
protocoles de données
IEC 62056-21 ou DLMS
taux de transmission maximale
jusqu’à 19200 baud (fixé ou Mode C/E)

10:14 Dec 31, 2019 

Do you have relevant terms in the context starting with the letters 'C' and 'E'?
Are 'C/E' not fixed, i.e variable modes?

08:36 Dec 31, 2019 

I think more context might help here; e.g., it would be useful to kno WHAT equipment can function in this mode or a 'fixed' mode?
As Phil says, there are many instances of modes given letters of the alphabet — but I have a doubt about that HERE, as it looks on the face of it as if this could be some specific mode that opposes (does it really?) 'fixed'. Don't let's forget that the use of the oblique '/' to mean 'or' is a lot less common in FR than in EN, and it often has tendency to be used to separate 2 letters that stand for soemthing, like in 'H/S'
Hence why only more context may allow us to be sure. I did find a handful of mentions of a 'C/E mode' associated with communication protocols, but sadly couldn't access the documents to check them out.
In any case, we don't know for sure if the 'fixed or C/E mode' is specifically related to the (maximum) bit rate or not.

08:36 Dec 31, 2019 

How would you translate it?

07:27 Dec 31, 2019 

I don't understand all those cryptic references to sensitive ears, ministers of education, and dead metal. But it sounds like you jumped on your high horse without bothering to read my reference, which is about IEC transmission protocol modes A to E, and which I believe may be relevant here.

04:44 Dec 31, 2019 

whose livelihood is defining standards would have to say to

"Mode C/E" probably doesn't stand for anything

I somehow think that it wouldn't be suitable for easily offended sensitive ears ....

Ah yes, I forgot an ex minister of education in UK advocating "who needs experts" seems to have gained some followers.

Reality check: these "meaningless letters" can make the difference between fully functioning IT equipment and devices with erratic behaviour, or in some extreme cases - the IT equipment turning into just a pile of dead metal.

16:01 Dec 30, 2019 

http://github.com/lvzon/dsmr-p1-parser/blob/master/doc/IEC-6...
It probably doesn't stand for anything - the modes are just allocated letters of the alphabet. But I could be wrong.