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Line 12: ==Digroup== '''Digroup''' is an abbreviation for '''[[Digital data\|digital]] group.''' In [[telephony]], a basic group in the [[digital multiplex hierarchy]]. In the North American and Japanese [[T-carrier]] digital hierarchies, each digroup supports 12 PCM voice channels or their equivalent in other services. The DS1 [[Line (electrical engineering)\|line]] rate (2 digroups plus overhead bits) is 1.544 Mbit/s, supporting 24 voice channels or their equivalent in other services.

Digital multiplex hierarchy: Difference between revisions