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IEVref:704-20-09ID:
Language:enStatus: Standard
Term: secondary digital group
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Definition: the assembly, by digital multiplexing, of a specified number of primary digital groups constituting the second level of a digital multiplex hierarchy

NOTE – The secondary digital groups standardized by CCITT operate at a digit rate of 6 312 or 8 448 kbit/s.


Publication date:1993-08
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