The Outer Freight Ring ran to the east from a junction north of Teltow station. From there, a proposed western extension of the ring to Potsdam via Stahnsdorf has not been realised. The line ran via Osdorf, Lichtenrade (connecting there to the Berlin–Dresden railway) and Großziethen to Schönefeld and from there it substantially followed the modern S-Bahn line via Altglienicke to Grünau Cross. Next, the route ran to the north taking a route close to today's Outer Ring from Eichgestell via Wuhlheide to Biesdorf Cross. There it passed under the Eastern Railway and continued to Karow to connect with the Stettin (now the Berlin–Szczecin) railway.
