Well, telecommunications have come a long way since childhood. Replacing the strings are glass cables (fibre optics) that transmit light along their length as the information carriers. In this digital age, scientists are now looking at ways to use quantum communication to make information more compact and secure than ever before by sending fibre optic signals as single particles (photons) of light.
See the full article and interview here:
http://research2reality.com/videos/written-light-quantum-communication/?utm_source=UofTHome&utm_medium=WebsiteBanner&utm_content=Aephraim%20Steinberg