How the Telephone WorksNo posterHow the Telephone Works1938Queuebrick VideoQueueLWatchedWFavoriteFListsDiscussionWhere to watchCopy short link1938How the Telephone Works7m·DocumentaryDirected by J.D. Chambers, Ralph EltonExperimental animation produced by GPO to explain telephone systems to the public.DirectorJ.D. ChambersDirectorRalph EltonStudioGPO Film UnitOverviewDiscussionCastCrewDetailsWhere to watchNo cast listed.