1. A communications technique that uses a common channel (multipoint or broadcast) for communications among multiple users by allocating unique time slots to different users.
Note: TDMA is used extensively in satellite systems, local area networks, physical security systems, and combat-net radio systems.
2. A multiple access technique whereby users share a transmission medium by being assigned and using (one… (Read More →)

1. Digital multiplexing in which two or more apparently simultaneous channels are derived from a given frequency spectrum, i.e., bit stream, by interleaving pulses representing bits from different channels.
Note: Successive pulses represent bits from successive channels, e.g., voice channels in a T1 system.
2. A multiplexing technique whereby two or more channels are derived from a transmission mediuim by… (Read More →)

Switching of time-division multiplexed (TDM) channels by shifting bits between time slots in a TDM frame.

An electronic instrument used to characterize and locate faults in metallic cables (e.g., twisted pair, coax).
Note 1: A TDR transmits a fast rise time pulse along the conductor. The resulting reflected pulse is measured at the input as a function of time and displayed on the instrument or plotted, as a function of cable length.
Note 2: A TDR… (Read More →)

Direct-sequence spread spectrum where the transmitter is on only for a short fraction of a time interval. The on-time can be periodic or random within a time interval. [NTIA]

1. A network parameter related to an enforced event designed to occur at the conclusion of a predetermined elapsed time.
2. A specified period of time that will be allowed to elapse in a system before a specified event is to take place, unless another specified event occurs first; in either case, the period is terminated when either event takes… (Read More →)

1. The interleaving of two or more independent processes on one functional unit.
2. Pertaining to the interleaved use of computer time that enables two or more users to execute programs concurrently.

In cryptography, a value that changes with each transaction or with each message value. [After X9.19]

See responsiveness.

Synonym timing recovery.