Q: If the JCs(basically Cm(t)) inserted in a OPU4 frame , is for next frame ?
-If yes then what is the value of JCs , for first frame ?
As explained in ITU TG 709 - Annex D:
"Before GMP Sink synchronization: incoming II/DI values are indication that GMP source may change Cm(t) values in next frame. This seems II/DI field of current frame is telling about Cm(t) of next frame.
Though after GMP sink synchronization: Spec says to use II/DI along with current Cm(t) to demap payload."
IS that the case, as if behavior of II/DI changes before (used to decode Cm(t) of next frame) and after (To decode Cm(t) of current frame) synchronization at sink side?
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