<Li> 1955: the laying of trans - Atlantic cable TAT - 1 began--36 circuits, later increased to 48 by reducing the bandwidth from 4 kHz to 3 kHz </Li> <Li> 1958: Modems used for direct connection via voice phone lines </Li> <Li> 1960: Bell Labs conducts extensive field trial of an electronic central office in Morris, Illinois, known at the Morris System . </Li> <Li> 1960's: Bell Labs developed the electronics for cellular phones </Li>

Where did the first telephone call take place