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Transport aspects 2

Figure 19-25B – ODTU23 frame format and mapping of ODU2
(mapping in 1.25G TS 1,2,5,9,10,25,26,32)
19.5.4 Mapping ODU0 into ODTU01

A byte of the ODU0 signal is mapped into an information byte of the ODTU01 (see Figure 19-26). Once per 2
OPU1 frames, it is possible to perform either a positive or a negative justification action.

The frame in which justification can be performed is related to the TSOH of the OPU1 TS in which the
ODTU01 is mapped (Figure 19-3). Figure 19-26 shows the case with mapping in OPU1 TS1.

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