Digital multiplex hierarchy: Difference between revisions

Revision as of 21:51, 17 February 2023

Revision as of 04:42, 18 February 2023

Line 3:

Digital [[multiplexing]] hierarchies may be implemented in many different configurations depending on; (a) the number of channels desired, (b) the [[Signalling (telecommunication)|signaling]] [[system]] to be used, and (c) the [[bit rate]] allowed by the [[telecommunication|communications]] media.<ref name="Weik 2000" />

Some currently available digital multiplexers have been designated as [[Digital Signal Designation|Dl-, DS-, or M-series]], all of which operate at [[T-carrier]] rates. <ref name="Weik 2000" />

In the design of digital multiplex hierarchies, care must be exercised to ensure [[interoperability]] of the multiplexers used in the hierarchy.

Line 9:

==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.

In the [[E-carrier]] European hierarchy, each digroup supports 15 PCM channels or their equivalent in other services. The DS1 line rate (2 digroups plus overhead bits) is 2.048 Mbit/s, supporting 30 voice channels or their equivalent in other services.

Line 21:

==References==

{{Reflist}}

*{{FS1037C MS188}}