Kinda irritating by the trash talking about electricians over there. Isn't this an old school analog telephone splice? I wouldn't call a phone guy an electrician. OP was in France, maybe different
The first London to Paris telephone service begins – archive, 1891 | Telecoms | The Guardian
French telephone pole hi-res stock photography and images - Alamy
Telephone cable France - Process Informatik Entwicklungsgesellschaft mbH
Ader's phone (or Ader-Gower electrophone): 1878 Collection France Telecom
New galvanized metal telephone pole - France Stock Photo - Alamy
Old concrete post with multiple telephone wires - France Stock Photo - Alamy
Buy Wholesale China France Type Modular Telephone Accessories Xjy-fr-12a 6p To 6p4c, Tel Adaptor With Cable Converter & Modular Telephone Accessories at USD 1.1 | Global Sources
Submarine Telephone Cable. /Nthe First Submarine Telephone Cable Connecting England And France Is Laid In The English Channel. Wood Engraving, 1891. Poster Print by Granger Collection - Item # VARGRC0090030 - Posterazzi
Help with trying to run Ethernet over 90metres with non Ethernet cable : r/HomeNetworking