October 2018
Intermediate to advanced
555 pages
17h 33m
English
Content preview from Principles of Synchronous Digital Hierarchy
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254 Principles of Synchronous Digital Hierarchy
Although higher rates than those shown in Figure 10.3 were also sparingly
used, they had been mostly proprietary designs of the manufacturers and
were not standardized by ITU-T.
10.2.5 Vendor Compatibility
The optical interface has been standardized in SDH. Before SDH, they were
not standardized, thus every vendor was using a different interface, leading
to incompatibility with the other. With the optical compatibility between the
equipment of various vendors, the equipment pertaining to different ven-
dors can be connected together without any special interface device. This
has proven to be a revol ...
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