pdf 41apr BLR "No Such Number: Tone for Dial Systems" Popular

By 1143 downloads

Download (pdf, 2.24 MB)

41apr_BLR_No_Such_Number_Tone_for_Dial_Systems.pdf

41apr BLR "No Such Number: Tone for Dial Systems"

April 1941 Bell Labs Record. Contributed by Steve Cichorsky

New User?

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

Recent Contributors

Thanks for new documents from Bruce Patterson, Jon Kolger, Paul Ivester, Len Hicken, Paul Fassbender, Fred Haynes, Kurt Rudolph, Wade ("Kellogg KITT"), the Connections Museum, Rick Walsh, Jeff Lamb, Jeremy Walters, Mark Cuccia, Alan David, Harry Joseph, Charlie Terry, Karl Brose, Dennis Hock, Tim Griffin, Remco Enthoven, and Steve Cichorsky.

Please send a file to add your name to this list!

Who's online

We have 117 guests online