There are four types: frequency division multiple access (FDMA), TDMA, CDMA, and orthogonal frequency division multiplex access (OFDMA). For full-duplex operation, there are two methods—frequency division duplexing (FDD) and time division duplexing (TDD).

Is TDMA a half-duplex?

By enabling 6.25 kHz equivalency, TDMA supports two simultaneous, independent half-duplex calls in a single 12.5 kHz repeater channel. ... That's why, with TDMA, two conversations can happen simultaneously and seamlessly via a single repeater.

What type of protocol is TDMA?

Time-division multiple access (TDMA) is a channel access method for shared-medium networks. It allows several users to share the same frequency channel by dividing the signal into different time slots. The users transmit in rapid succession, one after the other, each using its own time slot.