The first international phone call, sure.

A 1931 telephone
Photo: www.wikipedia.org

  On July 1, 1931 the first international telephone call was made.  It was made from Calais, Maine to another phone in Saint Stephen, New Brunswick, Canada.
  They could have used the old "two cans and some string" for that call!  The Saint John River isn't very wide for part of that border.  Or, they simply could have yelled real loud.  The two cities are
joined by one very busy bridge.  Many trucks cross the border every day from Canada headed to Ontario and other "western" provinces, it's a shortcut.

St. Stephen is the top city, Calais is the bottom on this map - click to enlarge
Photo: Google Maps