Outline of telecommunication

The following outline is provided as an overview of and topical guide to telecommunication:

Telecommunication – the transmission of signals over a distance for the purpose of communication. In modern times, this process almost always involves the use of electromagnetic waves by transmitters and receivers, but in earlier years it also involved the use of drums and visual signals such as smoke, fire, beacons, semaphore lines and other optical communications.

Types of telecommunication networks

Main article: Telecommunications network

Aspects of telecommunication transmission

Main article: Telecommunication

Telecommunication technology

Communications media types

Physical media for Telecommunication
Telecommunication through Free Space
- Broadcast radio frequency including television and radio
- Line-of-sight
  - Communications satellite
  - Terrestrial Microwave
  - Wireless LAN

Relationship between media and transmitters

Physical access to media
- Simplex
- Duplex (telecommunications)
Logical relationships

Multiple access to media

Multiplexing
- Analog
- Digital
  - Time-division multiplexing
  - Statistical multiplexing and Packet switching
- Media Access Control
  - Contention
  - Token-based
    - Centralized token control
    - Distributed token control

History of telecommunication

Main article: History of telecommunication

General telecommunication concepts

Major telecommunications equipment manufacturers

AT&T
Ericsson
Alcatel-Lucent
Avaya
Aricent
NEC
Nortel (bankrupt)
ZTE
Cisco Systems
Huawei
Ciena
Fujitsu
Nokia-Siemens Networks (now called Nokia Solutions and Networks)
HCL Technologies
ShoreTel
Wildix
Verizon

Major telecommunications service providers

Main article: List of mobile network operators

Outlines

General reference Culture and the arts Geography and places Health and fitness History and events Mathematics and logic Natural and physical sciences People and self Philosophy and thinking Religion and belief systems Society and social sciences Technology and applied sciences

Telecommunications

History	Beacon Broadcasting Communications satellite Computer network Drums Electrical telegraph Fax Heliographs Hydraulic telegraph Internet Mass media Mobile phone Optical telecommunication Optical telegraphy Photophone Prepaid mobile phone Radio Radiotelephone Satellite communications Smoke signals Telecommunications history Telegraphy Telephone The Telephone Cases Television Timeline of communication technology Undersea telegraph line Videoconferencing Videophone Videotelephony

Pioneers	Edwin Howard Armstrong John Logie Baird Alexander Graham Bell Tim Berners-Lee Jagadish Chandra Bose Vint Cerf Claude Chappe Lee de Forest Philo Farnsworth Reginald Fessenden Elisha Gray Innocenzo Manzetti Guglielmo Marconi Antonio Meucci Alexander Stepanovich Popov Johann Philipp Reis Nikola Tesla Camille Papin Tissot Alfred Vail Charles Wheatstone Vladimir K. Zworykin

Transmission media	Electromagnetic radiation Electrical cable Free-space optical communication Molecular communication Optical fiber

Network topology and switching	Links Nodes Terminal node Network switching (circuit packet) Telephone exchange

Multiplexing	Space-division Frequency-division Time-division Polarization-division Orbital angular-momentum Code-division

Networks	ARPANET BITNET Cellular network Computer Ethernet FidoNet Internet ISDN LAN Mobile NGN Public Switched Telephone Radio Telecommunications equipment Television Telex WAN Wireless World Wide Web

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