What is a TDM (time division multiplexing) Network?
It is a Digital network.
TDM divides the resources into time slots and transmits the time slots in turn, using the full capacity of the channel. Increasedcapacity was a major motivation for migrating the phone system to digital transmission.Each analog trunk could handle 12 calls, but digitized trunks, which usedthe same transmission facilities (wires), could handle 24 calls. Adding trunk linestook time and money—and lots of both. To add a trunk line, AT&T needed toevaluate potential routes, survey the chosen route, and acquire the right of way.