Page 1311 - 5G Basics - Core Network Aspects

Transport aspects – OTN 2

XI.3.2 Generating ODUflex(GFP) clock from system clock

The clock for an ODUflex(GFP) may be generated using a multiplier from the internal system clock.
Normally the internal system clock will have an accuracy of at least 20 ppm, perhaps even 4.6 ppm for a
network element that supports both SDH and OTN interfaces. The exact multiplier to be used is
implementation specific, and be chosen so that the range of the generated clock falls within the specified
100 ppm window around the nominal value of n  ODUk.ts.

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