Statistical TDM (STDM)
Designed to make use of the idle time slots
- (In TDM, when terminals are not using the multiplexed circuit, timeslots for those terminals are idle.)
Uses non-dedicated time slots
- Time slots used as needed by the different terminals
Complexities of STDM
- Additional addressing information needed
- Since source of a data sample is not identified by the time slot it occupies
- Potential response time delays (when all terminals try to use the multiplexed circuit intensively)
- Requires memory to store data (in case more data come in than its outgoing circuit capacity can handle)