On This Day in Telephone History, May 14TH and 15TH 1921, an Exceptional Aurora Borealis affected telegraph service. Powerful earth currents not only interrupted the direct current, grounded circuits used for Morse telegraphy, but burned out heat coils and charred cable insulation at many places in America and Europe.
On This Day in Telephone History May 23RD 1954
ON THIS DAY IN TELEPHONE HISTORY MAY 23RD 1954 AT 12:05 AM EST THE CHESAPEAKE & POTOMAC TELEPHONE COMPANY OF WASHINGTON, DC CHANGED TELEPHONE SERVICE FROM MANUAL TO DIAL.