October 2018
Intermediate to advanced
555 pages
17h 33m
English
Content preview from Principles of Synchronous Digital Hierarchy
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314 Principles of Synchronous Digital Hierarchy
71. Why is the pointer unit 3 bytes long?
72. Explain the process of justication by AU-4 pointer clearly indicat-
ing the role played by each bit.
73. What is NDF? Which bits make it up and what role does it play?
74. Calculate the bit rate adjustment range possible with AU-4 pointer.
How does it compare with the requirement of an SDH node?
75. Is frequent pointer adjustment desirable? If not, why?
76. Why is the AU-4 pointer 3 bytes long?
77. What are the differences in AU-4 pointer and AU-3 pointer?
78. Explain the TU pointer, giving details of the functions performed by
each byte.
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