pdf Telephony (book), 1938, Tones And Ringing Popular


Download (pdf, 6.24 MB)

Tones and Ringing.pdf

Telephony (book), 1938, Tones And Ringing

T. E. Herbert, 1938 - pp 33-35: Tones Provided in an Automatic Exchange, pp 181-189: Ringing Machines.

New User?

Read the articles under "Introduction" in the black menu bar above.

Recent Contributors

Thanks for new documents from Chuck Hensley, John Gilbert, Chuck Batson, Alan David, Steve Flocke, Paul Wills, Dave Gruger, Jim Prather, John Stancliff, Sam Etler, John Novack, Clint Gilliland, Steve Cichorsky and Paul Fassbender.

Please add your name to this list!

30 Latest Additions

Who's online

We have 150 guests online