Time-division multiplexing

TDMtime division multiplexingtime slottime-division multiplextime division multiplextime-division multiplexedtime-multiplexingtime slotstime-division multiplexermultiplex
Time-division multiplexing (TDM) is a method of transmitting and receiving independent signals over a common signal path by means of synchronized switches at each end of the transmission line so that each signal appears on the line only a fraction of time in an alternating pattern.wikipedia
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Bit rate

bitratedata ratedata transfer rate
It is used when the bit rate of the transmission medium exceeds that of the signal to be transmitted.
The physical layer net bitrate, information rate, useful bit rate, payload rate, net data transfer rate, coded transmission rate, effective data rate or wire speed (informal language) of a digital communication channel is the capacity excluding the physical layer protocol overhead, for example time division multiplex (TDM) framing bits, redundant forward error correction (FEC) codes, equalizer training symbols and other channel coding.

Multiplexing

multiplexedmultiplexmultiplexes
This form of signal multiplexing was developed in telecommunications for telegraphy systems in the late 19th century, but found its most common application in digital telephony in the second half of the 20th century.
Time-division multiplexing (TDM) is a digital (or in rare cases, analog) technology which uses time, instead of space or frequency, to separate the different data streams.

Émile Baudot

Emile BaudotBaudotBaudot, Emile
In the 1870s, Émile Baudot developed a time-multiplexing system of multiple Hughes telegraph machines.
The Telegraph Service encouraged Baudot to develop—on his own time—a system for time-multiplexing several telegraph messages using Hughes teleprinters.

Frame (networking)

frameframesdata frame
A sample byte or data block of sub-channel 1 is transmitted during time slot 1, sub-channel 2 during time slot 2, etc. One TDM frame consists of one time slot per sub-channel plus a synchronization channel and sometimes error correction channel before the synchronization.
In other telecommunications systems, a frame is a repeating structure supporting time-division multiplexing.

T-carrier

T1T-1T1 carrier
The T-carrier is a hardware specification for carrying multiple time-division multiplexed (TDM) telecommunications channels over a single four-wire transmission circuit.

Pulse-code modulation

PCMLPCMLinear PCM
The American inventor Moses G. Farmer conveyed telegraph time-division multiplexing (TDM) as early as 1853.

E-carrier

E1E-1digital trunks
The E-carrier is a member of the series of carrier systems developed for digital transmission of many simultaneous telephone calls by time-division multiplexing.

Telecommunication

telecommunicationscommunicationstelecom
This form of signal multiplexing was developed in telecommunications for telegraphy systems in the late 19th century, but found its most common application in digital telephony in the second half of the 20th century.
This method of dividing the medium into communication channels is called "time-division multiplexing" (TDM), and is used in optical fiber communication.

Telephone exchange

exchangescentral officeexchange
In 1962, engineers from Bell Labs developed the first D1 channel banks, which combined 24 digitized voice calls over a four-wire copper trunk between Bell central office analogue switches.
In other words, each voice channel is represented by a time slot (say 1 or 2) on a physical wire pair (A or B).

Frequency-division multiplexing

frequency division multiplexingFDMfrequency division multiplex
Modern telephone systems employ digital transmission, in which time-division multiplexing (TDM) is used instead of FDM.

GSM

Global System for Mobile CommunicationsGSM networkGSM (850/900/1800/1900)
Regardless of the frequency selected by an operator, it is divided into timeslots for individual phones.

Statistical time-division multiplexing

statistical multiplexingStatistical time division multiplexingstatistical multiplexer
Statistical time-division multiplexing (STDM) is an advanced version of TDM in which both the address of the terminal and the data itself are transmitted together for better routing.
This is an alternative to creating a fixed sharing of a link, such as in general time division multiplexing (TDM) and frequency division multiplexing (FDM).

Dynamic synchronous transfer mode

DTM
DTM is a time division multiplexing and a circuit-switching network technology that combines switching and transport.

Synchronous optical networking

SONETSDHSynchronous Digital Hierarchy
This solution worked for a while; however PDH suffered from several inherent drawbacks which ultimately resulted in the development of the Synchronous Digital Hierarchy (SDH).
Three STS-1 signals may be multiplexed by time-division multiplexing to form the next level of the SONET hierarchy, the OC-3 (STS-3), running at 155.52 Mbit/s.

Time-division multiple access

TDMAtime division multiple accessDynamic TDMA
TDMA is a type of time-division multiplexing (TDM), with the special point that instead of having one transmitter connected to one receiver, there are multiple transmitters.

McASP

Depending on the implementation, the McASP may be useful for time-division multiplexed (TDM) stream, Inter-Integrated Sound (I2S) protocols, and intercomponent digital audio interface transmission (DIT).

Circuit switching

circuit switchedcircuit-switchedcircuit-switched network
In its primary form, TDM is used for circuit mode communication with a fixed number of channels and constant bandwidth per channel.
The method of establishing the connection and monitoring its progress and termination through the network may also utilize a separate control channel as in the case of links between telephone exchanges which use CCS7 packet-switched signalling protocol to communicate the call setup and control information and use TDM to transport the actual circuit data.

Public switched telephone network

PSTNpublic telephone networktelephone network
In circuit-switched networks, such as the public switched telephone network (PSTN), it is desirable to transmit multiple subscriber calls over the same transmission medium to effectively utilize the bandwidth of the medium.
A DS0 is also known as a timeslot because DS0s are aggregated in time-division multiplexing (TDM) equipment to form higher capacity communication links.

Wavelength-division multiplexing

DWDMwavelength division multiplexingWDM
Modern optic fibre transmission makes use of wavelength-division multiplexing (WDM) where signals transmitted across the fibre are transmitted at different wavelengths, creating additional channels for transmission.

Route reestablishment notification

Route Reestablishment Notification (RRN) is a type of notification that is used in some communications protocols that use time division multiplexing.

Telegraphy

telegraphtelegramcable
This form of signal multiplexing was developed in telecommunications for telegraphy systems in the late 19th century, but found its most common application in digital telephony in the second half of the 20th century.

Digital data

digitaldigital informationdigitally
This form of signal multiplexing was developed in telecommunications for telegraphy systems in the late 19th century, but found its most common application in digital telephony in the second half of the 20th century.

Electrical telegraph

electric telegraphtelegraphtelegraph line
Time-division multiplexing was first developed for applications in telegraphy to route multiple transmissions simultaneously over a single transmission line.

David Edward Hughes

David E. HughesHughesHughes telegraph
In the 1870s, Émile Baudot developed a time-multiplexing system of multiple Hughes telegraph machines.