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Alarm analysis, Spare bits – EXFO IQS-8100 Series Transport Blazer for IQS-600 User Manual

Page 398

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PDH Tabs

384

IQS-8100 Series Transport Blazer

E2/8M RX

Alarm Analysis

Note: Only AIS is available when the framing is set to Unframed.

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LOF (Loss Of Frame): The LOF alarm indicates that four consecutive
incorrect frame alignment signals have been received.

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RAI (Remote Alarm Indication): The RAI alarm is declared when bit 11
of a framed E2 is set to “1”.

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AIS (Alarm Indication Signal): The AIS alarm is declared when an
unframed all-ones signal is received.

Spare Bits

Note: Spare Bits are not available when Framing is set to Unframed.

G.742 Bit 12 represent Bit 12 from Timeslot 1, 2, 3 and 4 respectively.
Possible values are 0 and 1.