The telephone is one of the first major devices for transnational and global communication. It is also considered the first mass-produced synchronous communication device (allowing messages to be exchanged at the same time), unlike its predecessor, the telegraph, which required ...

  • Loading...
locked icon

Sign in to access this content

Get a 30 day FREE TRIAL

  • Watch videos from a variety of sources bringing classroom topics to life
  • Read modern, diverse business cases
  • Explore hundreds of books and reference titles