EWSD re-asembly in Dörphof - Part 1 - The Foundation

A couple of retronetworking nerds took it upon them to rescue a fully operational Siemens EWSD (digital telephony) exchange. This is a part of a timelapse series of the re-assembly in its new home in Dörphof, Germany. See https://discourse.osmocom.org/t/die-rettung-der-ewsd/30 for related background