On This Day in Telephone History On May 17TH 1877 ET Holmes opened the first telephone exchange at 342 Washington St., Boston, Mass., with 5 subscriber lines

On This Day in Telephone History May 17TH 1877

by

E. T. HOLMES OPENED THE FIRST TELEPHONE EXCHANGE
LOCATED AT 342 WASHINGTON ST., BOSTON, MASSACHUSETTS
THE INITIAL SWITCHBOARD HAD 5 SUBSCRIBER LINES

 

🛠 Think Like a Telephone Engineer

Every breakthrough in telephone history began with an engineer solving a problem. Could you solve it?

▶ Start Today's Challenge