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Transport aspects 2

Table 7-9 – Number of tributary slots required for ODUj into OPUk
and for ODUk into OPUCn

# 5G TS # 2.5G # 1.25G

tributary slots tributary slots
OPUCn OPU2 OPU3 OPU1 OPU2 OPU3 OPU4
ODU0 1 – – 1 1 1 1
ODU1 1 1 1 – 2 2 2

ODU2 2 – 4 – – 8 8
ODU2e 2 – – – – 9 8
ODU3 8 – – – – – 31
ODUflex(CBR)

– ODUflex(IB SDR) 1 – – – 3 3 2
– ODUflex(IB DDR) 1 – – – 5 4 4
– ODUflex(IB QDR) 2 – – – – 9 8
– ODUflex(FC-400) 1 – – – 4 4 4
– ODUflex(FC-800) 2 – – – 7 7 7
– ODUflex(FC-1600) 3 – – – – 12 11
– ODUflex(FC-3200) 6 – – – – 23 22
– ODUflex(3G SDI) 1 – – – 3 3 3
(2 970 000)
– ODUflex(3G SDI) 1 – – – 3 3 3
(2 970 000/1.001)
– ODUflex(GFP) Note – – – n n n
– ODUflex(IMP) Note – – – – Note Note
– ODUflex(FlexE) Note – – – – Note Note
NOTE – Refer to equations 19-1a, 19-1b, 20-1a and 20-1b in clauses 19.6 and 20.5.

7.4 ODUk time-division multiplex

Figure 7-1 shows the relationship between various time-division multiplexing elements that are defined
below and illustrates possible multiplexing structures. Table 7-10 provides an overview of valid tributary
slot types and mapping procedure configuration options.
Up to 2 ODU0 signals are multiplexed into an ODTUG1 (PT=20) using time-division multiplexing. The
ODTUG1 (PT=20) is mapped into the OPU1.

Up to 4 ODU1 signals are multiplexed into an ODTUG2 (PT=20) using time-division multiplexing. The
ODTUG2 (PT=20) is mapped into the OPU2.

A mixture of p (p  4) ODU2 and q (q  16) ODU1 signals can be multiplexed into an ODTUG3 (PT=20) using
time-division multiplexing. The ODTUG3 (PT=20) is mapped into the OPU3.

A mixture of p (p  8) ODU0, q (q  4) ODU1, r (r  8) ODUflex signals can be multiplexed into an ODTUG2
(PT=21) using time-division multiplexing. The ODTUG2 (PT=21) is mapped into the OPU2.
A mixture of p (p  32) ODU0, q (q  16) ODU1, r (r  4) ODU2, s (s  3) ODU2e and t (t  32) ODUflex signals
can be multiplexed into an ODTUG3 (PT=21) using time-division multiplexing. The ODTUG3 (PT=21) is
mapped into the OPU3.

A mixture of p (p  80) ODU0, q (q  40) ODU1, r (r  10) ODU2, s (s  10) ODU2e, t (t  2) ODU3 and u
(u  80) ODUflex signals can be multiplexed into an ODTUG4 (PT=21) using time-division multiplexing. The
ODTUG4 (PT=21) is mapped into the OPU4.

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