Editing Time-division multiplexing (section)

==Technology==
Time-division multiplexing is used primarily for [[Digital data|digital]] signals but may be applied in [[Pulse-amplitude modulation|analog]] [[multiplexing]], as above, in which two or more signals or [[bit stream]]s are transferred appearing simultaneously as sub-channels in one communication channel, but are physically taking turns on the channel.<ref name="Kourtis">{{cite journal |doi=10.1080/00207219308925891 |first1=A. |last1=Kourtis |first2=K. |last2=Dangkis |first3=V. |last3=Zacharapoulos  |first4=C. |last4=Mantakas |title = Analogue time division multiplexing |
journal = International Journal of Electronics |
volume = 74 |
number = 6 |
pages = 901–907 |
year  = 1993 | 
publisher = Taylor & Francis | 
url= https://doi.org/10.1080/00207219308925891
|url-access=subscription }}</ref> The time domain is divided into several recurrent ''time slots'' of fixed length, one for each sub-channel. 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 (networking)|frame]] consists of one time slot per sub-channel, and usually a synchronization channel and sometimes an error correction channel. After all of these the cycle starts again with a new frame, starting with the second sample, byte or data block from sub-channel 1, etc.