Glossary entry (derived from question below)
French term
Italy
work, work, work!!
Native in: English 
, French
Works in: Italian to English, Italian to French, French to English, and 3 more.
frontière
Contexte : Si le bord ne stoppe pas les requêtes pour établir une session de communication suite au passage d'une frontière d'un RBC vers un autre RBC, le risque est qu'une session de communication s'ouvre entre le bord et le RBC au delà de la frontière alors que ça devrait pas être le cas.
| 1 +3 | boundary |
Tony M
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| 4 | border boundary (between two countries) |
jean-pierre belliard
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Non-PRO (1): writeaway
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Proposed translations
boundary
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Note added at 7 heures (2017-07-07 13:52:02 GMT)
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Not easy to Google, but this result seems to confirm:
Formal Modeling, Analysis and Verification of RBC Handover ...
https://www.researchgate.net/publication/262164558_Formal_Mo...
The models of RBC (Radio Block Center) handover are established by using Petri Nets for high-speed train operation across the boundary of RBCs. The safety ...
In general, 'boundary' is sued a lot with things that are organized by 'cells'.
| agree |
Mair A-W (PhD)
: sue 'em all (sorry)
22 mins
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Thanks, Dr Mair! Sorry, I have severe eyesight + co-ordination problems, sometimes typos slip through ;-(
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| agree |
Nikki Scott-Despaigne
: "boundary" is used here : https://books.google.fr/books?id=FKRjYw4e440C&pg=PA197&lpg=P...
6 hrs
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Thanks, Nikki!
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| agree |
gayd (X)
21 hrs
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Merci, David !
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France
Native in: German (Variant: Germany) , French
Works in: French to German, French to English, German to French, and 2 more.
border boundary (between two countries)
(RBC meaning Radio Block Center)
| neutral |
Tony M
: I don't think it is geographical borders here, there is a much lower-level sense to the term also.
5 hrs
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Reference comments
Native in: English , French
Works in: English to French, French to English, German to French, and 4 more.
ETCS ERTMS RBC and company
You can also have the English version
Psychologist, Court-certified legal
Native in: English 
Works in: French to English
"Computers in Railways XI". page 197 on which treains are described as crossing RBC boundaries.
Discussion
;)