October 2018
Intermediate to advanced
555 pages
17h 33m
English
Content preview from Principles of Synchronous Digital Hierarchy
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473Transmission Media for PDH/SDH and OFC Technology
optical signal into individual wavelengths, which are then further processed
for obtaining back the original digital signal.
The WDM technology has emerged as the most important technology in
telecommunication, after the invention of optical ber. The capacity of a link
can be multiplied manyfold (not just increased by some percentage) without
any addition of the physical media whatsoever.
This has come as a tremendous boon to the network operators, whose traf-
c carrying capacities on the already in place optical bers were exhausted.
Without incurring any cost on ber commissioning and withou ...
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