October 2018
Intermediate to advanced
555 pages
17h 33m
English
Content preview from Principles of Synchronous Digital Hierarchy
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243Plesiochronous Digital Hierarchy Maintenance Alarms
the name CRC-4, for use in E1 transmission. For different transmission
schemes, the CRC word length may be different, i.e., 5, 6, 7, 8, etc., and
accordingly the CRC scheme will be called CRC-5, CRC-6, CRC-7, CRC-8,
etc., respectively.)
This CRC word is transmitted in the next frame. At the receiver, the same
manipulations are performed again on respective SMFs and a local CRC
word is generated. The received and locally generated CRC words are com-
pared with each other. If they are found matching, then the received data has
no errors, else the data is interpreted ...
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