Skip to search formSkip to main content
You are currently offline. Some features of the site may not work correctly.

Director telephone system

Known as: Director, Director area, Director exchange 
The Director telephone system was a development of the Strowger step-by-step (SXS) switching system used in London and five other large cities in the… Expand

Papers overview

Semantic Scholar uses AI to extract papers important to this topic.
Film cinematography has been developed and applied for more than a century to involve and engage the viewer in visual… Expand
  • figure 1
  • figure 3
  • figure 5
  • figure 4