In the 1970s, optical fibers become a medium for telecommunications. These fiber lines, "long, thin strands of glass that carry signals via laser light," are more secure than radio and have become very cheap. From the 1990s to the present, the majority of communications between fixed locations has been achieved by fiber. Because these fiber communications are wired, they are protected under U.S. law.
In the 1970s optical fibers become a medium for telecommunications. These fiber lines, "long, thin strands of glass that carry signals via laser light," are more secure than radio and have become very cheap. From the 1990s to the present the majority of communications between fixed locations has been achieved by fiber. Because these fiber communications are wired, they are protected under U.S. law.