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I use Atoll - Planning Tool software, it's good and helpful.
PDH and SDH are two different multiplexing techniques used in telecommunication. Theirmain features are shown below in brief; PDH:Less synchronizedEasy to operateAbsent o ... Voir Plus
PDH means ple synchronous Digital hierarchy. And SDH means synchronous Digital hierarchy
Around 1990, SDH was developed and launched to replace PDH systems and eliminate synchronization problems for bulk data and phone exchanges, as well as to increase data t ... Voir Plus