Outline: Comparison between PDH and SDH. STM-N frame structure. Multiplexing of of 140Mb/s, 34Mb/s and 2Mb/s signals into STM-N frame. Common NE of SDH.

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Presentation transcript:

Outline: Comparison between PDH and SDH. STM-N frame structure. Multiplexing of of 140Mb/s, 34Mb/s and 2Mb/s signals into STM-N frame. Common NE of SDH network. SDH network structure and network protection mechanism. Management, monitoring and alarms.

Comparison between PDH and SDH SDHPDHPoint of comparison universal standard No universal standard Electrical & Optical Interface simplecomplexmultiplexing method High administration Poor administration Operation, administration & Maintenance compatible with other signals (ATM, FDDI &DQDB) Incompatible with other signals (ATM, FDDI &DQDB) Compatibility High B.WSave B.WBandwidth High coastLow coastCoast

Electrical interface PDH

SDH Electrical interface

Multiplexing Method

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