On this day (January 25) in the year 1915, Scottish inventor Alexander Graham Bell inaugurated the first US transcontinental telephone service, speaking from New York, NY to fellow inventor and American assistant Thomas Augustus Watson in San Francisco, CA.
Taking the obvious route for this one, I've picked "Telephone Line" (1976, released as single 1977) as the 'Today's Tune'. Cued up, are the original music video and a fairly recent looking live performance, both by the UK's pop band Electric Light Orchestra.
Electric Light Orchestra - "Telephone Line" music video (1977)
Electric Light Orchestra - "Telephone Line" Live