Exfo FTB-8500 Series for FTB-500 Manual do Utilizador descarregar pdf (Página 372)

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101

Advanced Tab

358 FTB-8500 Series and FTB-8120NGE/8130NGE

Service Disruption Time (SDT)

Configuration

Select the criteria that will be used for the SDT measurement.

Note: The service disruption measurements are cleared when changing the

criteria.

 Measurement Mode: Select the SDT measurement mode. Choices are

Defect Mode and No Traffic Mode. The default setting is Defect Mode.

Defect Mode is based on the detection of defects including LOS, Link

down, Invalid FCS, LSS, and Bit errors in the payload. The SDT

measurement is the time between the first defect and either the end of

the last defect preceding the No Defect Time period, or the end of the

test period.

No Traffic Mode is based on the absence of traffic. The SDT

measurement is the time between the end of the last received frame

and either the beginning of a new received frame, or the end of the test

period.

 No Traffic Time: Available for No Traffic Mode only. No Traffic Time is

a configured value which raises a defect if no Ethernet frame is

received during the defined test period. Choices are:

Unit choices are μs, ms, and s. The default setting is 10000 μs.

Rate No Traffic Time range

10/100/1000Mbps 10 to 99990 μs for FTB-8510B

20 to 99990 μs for FTB-8120NGE/FTB-8130NGE

and FTB-8525/FTB-8535

10Gbps 10 to 100000 μs for FTB-8510G

10 to 99990 μs for FTB-8120NGE/FTB-8130NGE

and FTB-8525/FTB-8535

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Exfo FTB-8500 Series for FTB-500 Manual do Utilizador Página 372

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