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.
Digital Signal 1
Plesiochronous Digital Hierarchy
This article incorporates public domain material from the General Services Administration document “Federal Standard 1037C” (in support of MIL-STD-188).
This article related to telecommunications is a stub. You can help Wikipedia by expanding it.