> For the complete documentation index, see [llms.txt](https://prosbcdocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://prosbcdocs.telcobridges.com/telecom-references/transmission-and-lines/tdm.md).

# TDM

Time Division Multiplexing, or TDM, is means of a combining two or more signal/media sub-channels along a given communications channel. It is the dominant approach for transmitting non-IP voice communications in a wireline communications network and is used in mobile telephony networks for communications between handsets and base stations.

### TelcoBridges and TDM

TelcoBridges supports TDM across its entire product line. All devices feature support for T1/E1/J1 interfaces, while some add support for DS3 and [STM-1](/telecom-references/transmission-and-lines/stm-1.md) interfaces as well via swappable [TDM modules](https://prosbcdocs.telcobridges.com/tmedia-documentation/products/tmedia/installation/tdm-module-options). The following table shows TDM options for the Tmedia and Tdev families of products:

![TDM options](https://docs.telcobridges.com/w/images/0/09/TDM_options.jpg)

### References

[Wikipedia article](http://en.wikipedia.org/wiki/Time-division_multiplexing)

## In this section

* [Automatic Protection Switching](/telecom-references/transmission-and-lines/automatic-protection-switching.md)
* [Channelize STM-1 to E1 Channel Mapping](/telecom-references/transmission-and-lines/channelize-stm-1-to-e1-channel-mapping.md)
* [DS3 Interfaces](/telecom-references/transmission-and-lines/ds3-interfaces.md)
* [HDLC](/telecom-references/transmission-and-lines/hdlc.md)
* [KLM vs ITU-T vs Alcatel](/telecom-references/transmission-and-lines/klm-vs-itu-t-vs-alcatel.md)
* [Line Interface](/telecom-references/transmission-and-lines/line-interface.md)
* [Line Service](/telecom-references/transmission-and-lines/line-service.md)
* [PCM](/telecom-references/transmission-and-lines/pcm.md)
* [Performance metrics](/telecom-references/transmission-and-lines/performance-metrics.md)
* [SONET/SDH interfaces](/telecom-references/transmission-and-lines/sonet-sdh-interfaces.md)
* [STM-1](/telecom-references/transmission-and-lines/stm-1.md)
* [T1, E1, and J1 interfaces](/telecom-references/transmission-and-lines/t1-e1-and-j1-interfaces.md)
* [T1/E1/J1 RJ48 Cable Diagram](/telecom-references/transmission-and-lines/t1-e1-j1-rj48-cable-diagram.md)
* [Timeslot](/telecom-references/transmission-and-lines/timeslot.md)
* [TMS Network Synchronization](/telecom-references/transmission-and-lines/tms-network-synchronization.md)


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