Outline of telecommunication
Telecommunication – the transmission ofsignals over a distance for the purpose ofcommunication. In modern times, this process almost always involves the use ofelectromagnetic waves by transmitters and receivers, but in earlier years it also involved the use of drums and visual signals such assmoke, fire, beacons, semaphore lines and other optical communications.
Types of telecommunication
Types of telecommunication networks
Aspects of telecommunication transmission
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
- Logical relationships
Multiple access to media
- Multiplexing
- Analog
- Digital
- Media Access Control
- Contention
- Token-based
- Centralized token control
- Distributed token control
History of telecommunication
Major telecommunications equipment manufacturers
- Alcatel-Lucent
- Aricent
- AT&T
- Avaya
- Ciena
- Cisco Systems
- Ericsson
- Fujitsu
- HCL Technologies
- Huawei
- NEC
- Nokia-Siemens Networks (now called Nokia Solutions and Networks)
- Nortel (bankrupt)
- ShoreTel
- Verizon
- Wildix
- ZTE
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