20 Party Per Line, Dial Rjural Code Ringing on a Single Wire in the Bell System – Bruce Crawford 558

[featured_image]
  • Version
  • Download 8
  • File Size 0.00 KB
  • File Count 1
  • Create Date July 1, 1994
  • Last Updated June 30, 1994

20 Party Per Line, Dial Rjural Code Ringing on a Single Wire in the Bell System - Bruce Crawford 558

Attached Files

FileAction
20 Party Per Line Dial Rjural Code Ringing on a Single Wire in the Bell System - Bruce Crawford 558Download