Review Questions


20. Define SOH, LOH and POH.

21. Define VT.

22. Explain the four types of VT.

23. Explain the SONET multiplexing.

24. Write short notes on ADM and DCS.

25. List the popular topologies of SONET and compare them with neat diagrams.

26. What are the major advantages of ring network.

28. How the SDH format differs from SONET ?

29. How the higher STM frames can be derived.

30. Tabulate the comparison of STS and STM rates.

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