S1-ES, S2-ES, S1-SES, and S2-SES are the calculated values according to ITU
Recommendation, and vary depending on Allocation and Period of
Performance Parameters. When the measured ES value is equal to or less than
S2-ES or the measured SES value is equal to or less than S2-SES, the result is
judged as Pass.
PDH Performance Measurement ItemsPDH Performance Measurement Items
This paragraph describes the performance result items. Measurement time
definitions are as below.
S
Total
Total measurement time. This is the total time of the measurement excluding
the time of power failure.
S
Avail
Available time of measurement. Calculated from the following formula:
S
Avail
=S
Total
-S
Unavail
S
Unavail
Unavailable time of the measurement. Refer to UAT definition.
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