Wib Banyak Tanpa Izin Penggunaan Nuklir di Rumah Sakit dan Klinik Sejarah Pesawat Telepone Timeline 1900 John J. Carty of New York Telephone installs loading coils, invented by Michael Pupin, to extend range and reduce crosstalk. 1935 First telephone call around the world. Science fiction writer Arthur C. Clarke proposes communications satellites.
Telcos install nationwide numbering plan.
1950 Party lines make up 75 percent of all telephone lines. 1955 Modem first described by Ken Krechmer, A. W. Morten, and H. E. Vaughn. Texas Instruments introduces the silicon-based transistor. Telephone cables start to use plastic insulation. Bell Labs releases design information to Western Electric for modular telephone cords and jacks 1975 Last manual telco switchboard in Maine is retired.