digital transmission group

In telecommunication, a digital transmission group is a group of digitized voice or data channels or both with bit streams that are combined into a single digital bit stream for transmission over communications media. Digital transmission groups usually are categorized by their maximum capacity, not by a specific number of channels. However, the maximum digital transmission group capacity must be equal to or greater than the sum of the individual multiplexer input channel capacities.

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dejitterizer
delay
delay encoding
delay line
delta modulation
demand assignment
demand factor
demand load
desensitation
design objective
detector

deterministic routing
d 4
pulse dialing
dial up
dielectric
dielectric strength
differential encoding
differential manchester encoding
diffraction grating
digital access and cross connect system
digital filter

digital milliwatt
digital multiplex hierarchy
digital signal 0
digital subscriber line
digitizer
digroup
direct access
direct connect
direct distance dialing
directional coupler
directive gain

direct sequence spread spectrum
disengagement originator
dispersion limited operation
distortion
distortion limited operation
distributed database
distributed queue dual bus
distributed switching
disturbance voltage
diurnal phase shift
diversity reception