Cause Analysis
OTUk rate = 255/(239-k) x STM-N frame rate
ODUk rate = 239/(239-k) x STM-N frame rate
OPUk rate = 238/(239-k) x STM-N frame rate
http://localhost:7890/pages/31188390/01/31188390/01/resources/public_sys-resources/icon-note.gif NOTE:
- ODU0 and OTU5G frames are not standard frame structures defined in ITU-T G.709. Therefore, their rates cannot be calculated by using the preceding formulas.
- An ODU0 frame encapsulates one GE frame and is cross-connected between a tributary or line board and an XCH or XCM board. The XCS board does not support ODU0 services. OTU boards do not provide OTU0 ports on their WDM sides.
- One OTU5G frame encapsulates four GE frames. Currently, only L4G and LQG boards provide OTU5G ports on their WDM sides.
Rates for different frame structures are as follows:
- OTUk
- OTU1: 2 666 057.143 kbit/s = 255/238 x 2 488 320 kbit/s
- OTU5G: 5 Gbit/s
- OTU2: 10 709 225.316 kbit/s = 255/237 x 9 953 280 kbit/s
- OTU3: 43 018 413.559 kbit/s = 255/236 x 39 813 120 kbit/s
- ODUk
- ODU0: 1.25 Gbit/s
- ODU1: 2 498 775.126 kbit/s = 239/238 x 2 488 320 kbit/s
- ODU2: 10 037 273.924 kbit/s = 239/237 x 9 953 280 kbit/s
- ODU3: 40 319 218.983 kbit/s = 239/236 x 39 813 120 kbit/s
- OPUk
- OPU1: 2 488 320 kbit/s
- OPU2: 9 995 276.962 kbit/s = 238/237 x 9 953 280 kbit/s
- OPU3: 40 150 519.322 kbit/s = 238/236 x 39 813 120 kbit/s
