i had the feeling. siemens eds gave some people a hard time back then. i may understand kirstein's retention somehow better.

The German approach to the new data communication network, based on the Siemens EDS switch and their concept of ‘transparency’ is entirely opposed to the approach taken by the U.K. Post Office. Although we may not expect to change the views of the Germans and those who have adopted their approach, I believe that we should state our views strongly and clearly in the hope of persuading others not to adopt the German approach. World agreement on the German network would put back the realisation of a useful data network by 20 years. | davies, geneva ccitt notes

considering the political role of germany in ecc, osi .. one day i will start to count years caused.

its also said:

Germany does not intend to have pcm links on any significant basis for fifteen years, but clearly wish somehow or other to adapt EDS for carrying customer originated synchronous data. | davies report

pcm: puls code modulation eds: the electronic data switching system