In 1876 Alexander Graham Bell invented what the world knows as telephone. This was a device which had the capability of transmitting speech using the electrical signals. This was a very critical turn in the conduit of communication. There was an initial controversy as who invented the telephone first. There was a bit of debate and after analyzing the case, Bell won. Elisha Gray designed a similar model at the same time but missed the patent procedure by hours. The invention of telephone was indeed a milestone in science history. The telegraph was initially used to send signals. However, the issues that existed with the telegraph were that it could only send the Morse code once at a time. This meant that no simultaneous signals can be sent through a single electrical line. This issue was overcome by the model of multiple telegraphs. Experimenting with the existing model of telegraph that had existed for over 3 decades and merging it with the concept of multiple telegraphs, Graham finally came out with the machine known as telephone. This was used to send sound signals enclosing multiple pitches and all being sent simultaneously over the same line. This was indeed one of the most revolutionary inventions made ever.