Exfo FTB-8100 Series Transport Blazer for FTB-500 Uživatelský manuál stáhnout pdf (Strana 538)

100

101

System Tab

524 FTB-8100 Series Transport Blazer

Clock Synchronization

Alarm Analysis

Note: AIS and LOF alarms are not available for 2MHz clock.

³ LOS (Loss Of Signal): The LOS alarm indicates absence of an input

signal or an all-zeros signal is received.

³ AIS (Alarm Indication Signal): The AIS alarm is declared when an

unframed all-ones signal is received.

³ LOF (Loss Of Frame):

For DS1: The LOF alarm indicates that there was no valid framing

pattern for 40 milliseconds and there was at least one OOF error during

this period.

³ With SF Framing: The Loss-of-Frame condition will be assumed

when 2 terminal frame and/or signaling frame errors in 5

consecutive frames have been received.

³ With ESF Framing: The Loss-of-Frame condition will be assumed

when 2 FPS frame errors in 5 consecutive frames have been

received.

For E1: The LOF alarm indicates that three consecutive incorrect

frame alignment signals have been received.

1 2 ... 533 534 535 536 537 538 539 540 541 542 543 ... 718 719

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Exfo FTB-8100 Series Transport Blazer for FTB-500 Uživatelský manuál Strana 538

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