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Early tech | Electronics | Wireless | Digital | Operators | Cables and wires | Exchanges | Phreaking/Hacking | Dialing | Switching | Telegraph | Wired Tech | Office systems | Payphones | Data services | Line workers | Operations
American Bell creates Long Lines division
Telephone Exchanges open in Berlin, Vienna, and Sydney
First telephone lines in Constantinople and Egypt
Metallic circuit introduced
First telephone exchanges in India, Russia, and Shanghai
First long-distance line: Boston to Providence
Telephone service begins between Tokyo and Yokohama
First dial telephones introduced
First multiplexed telephone circuits
Dial phones spread to major cities
Type C carrier system deployed
Pfann invents zone refining (melting), enabling purer silicon for transistors and semiconductors
Transistors first used in telephone equipment
Improved echo suppressors deployed
T1 digital carrier system developed
Japan achieves nationwide automatic telephone service
Northern Telecom DMS-100 digital switch
First trial of Bell Labs' cellular communication system begins
Bell Labs creates first single-chip digital signal processor (DSP)
Siemens debuts digital telephone switching
NTT launches world's first ISDN service
TAT-8: First transatlantic fiber optic cable
TPC-3: First transpacific fiber optic cable
SS7 signaling becomes widespread
VoIP demonstrated commercially by VocalTec Communications
