In frequency-division multiplexing, the rank of frequency bands occupied:

12 channels
group

5 groups (60 channels)
super group

5 super groups (300 channels)
master group (CCITT--now, ITU-T)

10 super groups (600 channels)
master group (U. S. standard)

6 U. S. master groups (3600 channels)
jumbo group

Encryption in which a single cryptographic device is used to encrypt all of the data in a multiplexed link.

A device that combines multiple inputs into an aggregate signal to be transported via a single transmission channel. Synonym multiplexing equipment.

A device that combines the functions of multiplexing and demultiplexing of digital signals.
Note: The term muldem should not be confused with modem.

The combining of two or more information channels onto a common transmission medium.
Note: In electrical communications, the two basic forms of multiplexing are time-division multiplexing (TDM) and frequency-division multiplexing (FDM). In optical communications, the analog of FDM is referred to as wavelength-division multiplexing (WDM).

Synonym multiplexer.

Synonym multiple.

Access in which more than one terminal is supported by a single network termination.

A circuit that interconnects three or more separate points.

A network configuration where there are more than two access points. [T1.620-1991]