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2 Transport aspects
Table 7-7 – ODTU payload bandwidth (kbit/s)
ODTU payload
ODTU type ODTU payload nominal bandwidth
bit-rate tolerance
ODTU01 (1904 + 1/8)/3824 ODU1 bit rate
ODTU12 (952 + 1/16)/3824 ODU2 bit rate
ODTU13 (238 + 1/64)/3824 ODU3 bit rate
ODTU23 (952 + 4/64)/3824 ODU3 bit rate
20 ppm
ODTU2.ts ts 476/3824 ODU2 bit rate
ODTU3.ts ts 119/3824 ODU3 bit rate
ODTU4.ts ts 47.5/3824 ODU4 bit rate
ODTUCn.ts ts 190.4/3824 ODUCn bit rate/n
Minimum Nominal Maximum
ODTU01 1 244 216.796 1 244 241.681 1 244 266.566
ODTU12 2 498 933.311 2 498 983.291 2 499 033.271
ODTU13 2 509 522.012 2 509 572.203 2 509 622.395
ODTU23 10 038 088.048 10 038 288.814 10 038 489.579
ODTU2.ts ts 1 249 384.632 ts 1 249 409.620 ts 1 249 434.608
ODTU3.ts ts 1 254 678.635 ts 1 254 703.729 ts 1 254 728.823
ODTU4.ts ts 1 301 683.217 ts 1 301 709.251 ts 1 301 735.285
ODTUCn.ts ts 5 240 781.554 ts 5 240 886.372 ts 5 240 991.189
NOTE – The bandwidth is an approximated value, rounded to 3 decimal places.
Table 7-8 – Recommended ODUflex (GFP) bit rates and tolerance
ODU type Nominal bit-rate Tolerance
ODU2.ts(Note 1) 1'249'177.230 kbit/s
ODU3.ts(Note 1) 1'254'470.354 kbit/s
ODU4.ts(Note 1) 1'301'467.133 kbit/s
ODUflex(GFP) of n 1.25G tributary slots, 1 n 8 n ODU2.ts 100 ppm
ODUflex(GFP) of n 1.25G tributary slots, 9 n 32 n ODU3.ts 100 ppm
ODUflex(GFP) of n 1.25G tributary slots, 33 n 80 (Note n ODU4.ts 100 ppm
2)
NOTE 1 – The values of ODUk.ts are chosen to permit a variety of methods to be used to generate an ODUflex(GFP) clock. See
Appendix XI for the derivation of these values and example ODUflex(GFP) clock generation methods.
NOTE 2 – Transport of packet clients via an ODUflex(GFP) is specified up to 100 Gbit/s.
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