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1991-12-31
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945b
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Recommendation R.11
Add the following sentences to the note:
"Pending further study and more specific advice, arithmetic addition of
distortion can be safely assumed for simplicity in all cases. Although pessimistic
this will not lead to unnecessarily restrictive planning decisions in those cases
where there is a regenerative link in the chain, e.g., Recommendation R.101 TDM or a
regenerative SPC exchange. However, where another law is known to apply then the
appropriate law of addition can be used.
e.g.:
mcvft - see text of Recommendation above
code-independent tdm-see note above for non-synchronized tandemed systems
- for synchronized tandemed systems the distortion due
to the multiplexing process will be that of a single
system
code-dependent tdm-regenerative"