EXFO FTB/IQS-88000 Series Power Blazer for FTB-2/2Pro/500/IQS-600 - Manual (Page 310)

Test Results
298 FTB/IQS-88000 Series
Alarms/Errors
Note: The following alarms are available with G.8113.1, Y.1731 and MEF modes.

AIS (Alarm Indication Signal)
RX: A valid AIS frame is received. A valid frame has its destination MAC
address matching either the unit port Unicast MAC address or a
Multicast class 1 address
1
, VLANs matching the unit port VLANs, and
MEG level matching the local MEG level. The alarm is cleared when
during an interval equal to 3.5 times the AIS transmission period
indicated in the last received AIS frame, no AIS frames are received.

LCK (Locked)
RX: An valid LCK frame is received. A valid frame has its destination
MAC address matching either the unit port Unicast MAC address or a
Multicast class 1 address
1
, VLANs matching the unit port VLANs, and
MEG level matching the local MEG level. The alarm is cleared when
during an interval equal to 3.5 times the LCK transmission period
indicated in the last received LCK frame, no LCK frames are received.

C-LOS (Client Signal Fail - Loss Of Signal)
RX: A CSF frame is received with CSF type equal to 000. The alarm is
cleared when no CSF (C-LOS) frames are received during an interval
equal to 3.5 times the CSF transmission period indicated in the last
received CSF (C-LOS) frame, or when a CSF frame is received with
Client Defect Clear Indication (C-DCI) information (CSF Type 011).
TX: Generates a CSF frame with CSF type equal to 000.

C-FDI (Client Signal Fail - Forward Defect Indication)
RX: A CSF frame is received with CSF type equal to 001.The alarm is
cleared when no CSF (C-FDI) frames are received during an interval
equal to 3.5 times the CSF transmission period indicated in the last
received CSF (C-FDI) frame, or when a CSF frame is received with
Client Defect Clear Indication (C-DCI) information (CSF Type 011).
TX: Generates a CSF frame with CSF type equal to 001.