Rondon, who returned to a hero's welcome in Rio de Janeiro, succeeded in extending telegraph wires to form a communications network across Brazil.
From the en.wikipedia.org
The submarine telegraph cable received its definitive form through Newall's initiative, involving the use of gutta percha surrounded by strong wires.
From the en.wikipedia.org
The first telegraphs came in the form of optical telegraph including the use of smoke signals, beacons or reflected light, which have existed since ancient times.
From the en.wikipedia.org
The earliest attempts in 1870 came before Dickens's body was cold, in the form of newspaper obituaries, as news of his death hummed across the telegraph wires.
From the telegraph.co.uk
Telephone and telegraph networks were disrupted, and within hours amateur radio operators went into the affected areas with their equipment to form a voluntary emergency radio network.