This webpage has been initiated on 12 May 2017



Fernsprech-Fernkabel 1929




Siemens & Halske AG.

Abteilung für Schwachstromkabel (SK2)

Berlin - Siemensstadt (Gartenfeld)

    Die Herstellung der Fernkabelanlage Paris - Bordeaux wurde im August 1927 als Reparationslieferung der Siemens & Halske AG. als Generalunternehmerin übertragen. Die Kabellieferung für die Strecke Tours - Bordeaux übernahm die Felten & Guilleaume Carlswerk AG. Köln-Mühlheim, während die Siemens & Halske AG. die Kabelstrecke Paris - Tours, die Pupinspulen und Verstärkereinrichtungen für die gesamte Anlage herstellte und den Zusammenbau bis bertriebsfertigen Übergabe ausführte.

    Das Fernkabel Paris - Bordeaux hat eine Gesamtlänge von 563 km und verläuft von Paris über Orléan, Tours, Potier, Angoulême nach Bordeaux (Bild 1).     In den genannten Städten wurden Verstärkerämter errichtet: die gesamte Anlage setzt sich somit aus fünf Verstärkerfeldern von folgenden Längen zusammen.

Paris - Orléan                    117 km

Orléan - Tours                   120 km

Tours - Potier                     101 km

Potiers - Angoulême         109 km  

Angoulême - Bordeaux    116 km


What becomes clear from the foregoing introduction, is, that the project was the result of the conditions under the Treaty of Versailles, in 1919.

The victor's aims was to harm their former opponent, whatever we may think of it; it has an enormous self-harming effect on their own economy. Because, by acting that way, their own industry otherwise would have got to accomplish these projects.

After both the First- and the Second World War, Germany lost nearly everything, like suffered their opponents. But after a while matters have to be rebuilt and replaced, which creates economical prosperity.

Most of the content of this historical publication deals with cable laying, but some intriguing aspects attracted my attention. I have to admit first, that my 'specialism' is electronics and not telephone techniques. However, in some way we have been confronted with aspects of telephone technique and therefore some appeal does exist.

Therefore we would like to bring you in touch with some peculiar aspects of early cable and line-laying techniques. We have to think of capacitive matching of cables, but also about amplifier stations.


For your convenience, the first text page including the map of the French telephone network being reproduced



Cable in/out of a pupin-coil box (Pupinspulenkasten)

According the introduction chapter: their cable supplied 101 channels. The cable type was Dieselhorst-Martin (DM)



Genuine text: Pupinspulenkasten in den unterirdischen Gängen von Paris 



Genuine text: Kondensatorausgleich auf der Strecke bei Monteaux



Genuine text: Kondensatorausgleich auf der Strecke bei Monteaux



Genuine text: Darstellung des Einbaues von Kondensatoren

This photo I like most. It is apparent, that great care has to be taken as to the capacitance cable loading (and symmetry)



Genuine text: Verstärkeramt in Tours, Verstärkergestell



Genuine text: Verstärkeramt in Tours, Meßschränke


S&H Fernsprech-Fernkabel 1929 Genuine version

S&H Fernsprech-Fernkabel 1929  90° rotated version


Please notice, that what is shown is my choice, and of no one else.

Would someone like to contribute as well, don't hesitate to contact us.

As long as it is in the line of our objectives

Please type in what you read


By Arthur O. Bauer