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H31-311 – Huawei Certified Network Associate - Transmission

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Showing 7–9 of 10 questions

Question 7

Optical supervisory channels are intended for the supervisory of WDM optical transmission systems. In ITU-T recommendations, 1510 nm wavelengths at a ( ) rate are preferentially used.

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  • ○

    64 kbit/s
  • ○

    192 kbit/s
  • ○

    2Mbit/s
  • ○

    576 kbit/s
Question 8

According to the formula of "ODUk rate = 239/(239-k) x STM-N frame rate", the ODU4 rate is equal to 239/235 x STM-N frame rate.

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  • ○

    TRUE
  • ○

    FALSE
Question 9

SES: There are 5% or more than 5% bit error blocks or at least one defect (OCI/AIS/LCKAAE/LTCA1M/PLM) within one second.

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  • ○

    TRUE
  • ○

    FALSE