L4 carrier system

Directory

References

Discover

The Cheshire Cat is a fictional cat from Lewis Carroll's Alice's Adventures in Wonderland. (Alice in Wonderland)

11 Banned Books Through Time

earthquake. Heavily damaged school in the town of Yingxiu after a major earthquake struck China's Sichuan Province on May 12, 2008.

The 6 Deadliest Earthquakes Since 1950

New York NY/ USA- November 23, 2018 Hordes of shoppers throng the Macy's Herald Square flagship store in New York looking for bargains on the day after Thanksgiving, Black Friday.

Why Is It Called Black Friday?

Super Typhoon Noru over the western tropical Pacific Ocean as observed by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA Aqua satellite July 31 2017

What Is the Difference Between a Typhoon and a Super Typhoon?

Thanksgiving Turkey with all the sides

Why Do We Eat Turkey on Thanksgiving?

Rural Irish landscape, Sligo, Ireland.

Why Is Ireland Two Countries?

John F. Kennedy as a boy with his family

What Did We Call America’s Elite Before the “1 Percent”?

L4 carrier system

telecommunications

Learn about this topic in these articles:

long-distance telephone transmission

In telecommunication: Frequency-division multiplexing
In the L4 system, developed in the 1960s, six master groups were combined to form a jumbo group signal of 3,600 voiceband signals.
Read More